Find the Whiplash obstacle course. Get to the top of the ladder with the "Start" banner. A message stating that whiplash has started will appear. Go through the obstacles without falling in the water. You can restart if you fall by going to the "Start" point again. Consider using Sky Goat, Angel Goat, or a similar mutator that allows you to glide in the air to avoid falling. Avoid the following hidden traps:

Do not stand in the center of the top of the white pillar with the red "pillows". There is a trapdoor directly underneath that will throw you into the water.

The second orange wall block is a trapdoor that will try to throw you to the left.

The red floor block just before the spinning bar will hit you into the air above the spinning bar. However, be careful with the last orange wall block at the top. If you reach it, it is a trap-door. It has no effect if you are gliding.

The third pillar right after the orange wall will bump you into the air as soon as you step on it.