A locomotive carrying coal is left crumpled near Philadelphia and the coal vanishes, leaving only a giant crystal. Matt and Hondo follow gravity ripples to Mayhem in Switchblade, whose weapon destroys Hondo's Firecracker. V.E.N.O.M. armors its vehicles in crystal and heads for the Philadelphia Mint. M.A.S.K. brings in Bruce and Gloria, uses Alex's coordinates to find the weak points in the crystal, and sends Gloria on an end run against Mayhem. Hondo, left without a vehicle, is shown Night Stalker, the Hurricane.
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A locomotive crumples under a red beam, the engineer runs clear, and the only thing missing from the train is its coal. "A Matter of Gravity" keeps its opening mystery plain: nobody sees the weapon, a conductor points out that fifty trucks would have left tracks and there are none, and the one clue is a boulder of pale blue crystal that Scott and T-Bob find lying in the forest.
The M.A.S.K. computer says the crystal is not of natural origin but was compressed into shape by some extreme force, and a scan finds ripples in the Earth's gravitational field. The trail leads to Vanessa, then to Mayhem in Switchblade, and then to the part the episode is really about: Hondo's Firecracker floats in a pink spotlight, slams into a tree and breaks into shards. The wreck is the event. Everything that follows is an answer to the question of what Hondo drives next.
This is the spine of the episode, and the plot is built around it: a crushed Firecracker at one end, a blue Hurricane at the other, and Hondo with no vehicle in between. The computer picks Bruce and his Rhino for the mission and notes that Shark's weapons may be of value, the fight moves to Philadelphia, and Hondo spends it on the sidelines wishing he had something to drive. The episode closes on a line from the garage, "Meet Night Stalker," which feels like the one payoff the story owed him.
The writing leans hard on money and gravity puns, and Scott's cover story helps: he has a school report to write about money, which is how he and T-Bob come to be standing at the Mint wondering aloud about spearmint and peppermint. Someone remarks that it sounds like a matter of some gravity and is told they have been around T-Bob too much, and T-Bob's nickel-and-dime joke at the Mint earns a threat of confinement to quarters. It is a lot of wordplay for one show, but the plot's main device, a weapon that makes things heavier, is its own pun, and the script does not pretend otherwise.
On the craft side the gravity beam gets the strongest staging. The pink spotlight that lifts the Firecracker, the red rings that spin out near a window in Philadelphia, and the pale crystal that shatters into fragments across a building give the beam a visible reach. The standout is the Firecracker's end, a run of shots that moves from a truck hovering in a pink glow to a smash against the tree to splinters.
The solution is stacked. V.E.N.O.M.'s crystal armor is broken by Alex's coordinates for the fracture points, with the explanation that the crystal is like diamond and will fracture if struck in the right spot, and Bruce suggests that the ugly one could not bear to see its own face, so Gloria is sent on an end run while the others draw Mayhem's fire. Two good ideas in one fight is a lot, and the Mint, the stated target, is barely seen: a look over a railing from Scott and T-Bob, then a street battle. The fan wiki also lists a run of continuity slips, including T-Bob walking about undamaged right after being squashed and Thunderhawk's door missing and restored from shot to shot, so the animation is not at its most careful.
It is a busy episode and a good one, because the gravity weapon is a fair threat and the vehicle swap gives Hondo an arc: he loses the truck and is handed a new one!
- The M.A.S.K. wiki lists this as the first episode featuring Hurricane, identified as Night Stalker, and its Hurricane page gives this episode as the vehicle's first appearance.
- The wiki's Hurricane page says the toyline's original color guides named the vehicle Night Stalker, that Mattel owned the rights to that name, and that it was changed to Hurricane, which explains why several episodes use the earlier name.
- The wiki's Hurricane page lists a 1986 toy and a 2026 re-release in the second wave of The Loyal Subjects collaboration.
- The wiki points out that the episode's safety tip about the kitchen garbage disposal is virtually the same as the one in 'Caesar's Sword'.
- The wiki says this is the first of four first-season episodes in which Sly Rax does not appear, the others being 'The Spectre of Captain Kidd', 'The Royal Cape Caper' and 'Stone Trees'.
- The wiki records that the shot of Thunderhawk converting to jet mode and taking off is used three times, and that the second use is flipped horizontally, putting Matt behind the wheel on the opposite side.
- The wiki lists Sharon Noble as the voice of Gloria Baker, Vanessa Warfield, the M.A.S.K. Computer and the news reporter Jude Wilson in this episode.
- The wiki's Buddie Hawks page lists this episode as a non-speaking cameo for him, and the wiki's Condor page lists a brief cameo for Brad Turner's vehicle.
- The wiki notes that an unmasked, mohawked V.E.N.O.M. henchman is seen unloading raw crystals from a truck with a bulldozer.
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