Frosty's Snap-Door Trap

Frosty's Snap-Door Trap is a device designed by Frosty to trap Maths Mafia victims. The idea is, when they walk over the trap door, it snaps open, revealing the chasm in which a vicious killer snowman resides, who then preceeds to snap at the victim, snapping their bones. So, overall, there is justification for the use of the word snap in the name.