HOLY NOPE. First, watch this video and try not to have a panic attack.
This cyclist was making some runs at Gooseberry Messa in Utah and went head to head with a crevice on a cliff. It did not end pretty.
Luckily, his friend filming was there to help immediately (while, like the YouTube comment says, being a real champ and filming in landscape). Make sure to watch the entire video, as the cliff’s true height is shown at the end and wow, that would have been one seriously bad spill.
[H/T Nate Howard, YouTube]