Season 4's Snow Blower
The Snow Blower is an obstacle, used as the first obstacle in the Qualifier of Season 4’s Winter Wipeout (Episode 4x08).
It is a modified version of the Pitchfork Tumblers (which were used as the first obstacle in the Qualifier during episode 12 of Season 3).
Contestants must cross an unstable trampoline walkway while avoiding the three-pronged blowers spinning overhead. There are two sets of two blowers on this obstacle with a checkpoint staircase in between.
In Season 4, Episode 18, it was later modified again into the Lawnmowers when the season moved on to Summer Wipeout.