I can't remember; Morbit uses it a lot, primarily to escape foes it thinks are more powerful. It doesn't always work, but I haven't played Morbit in ages and I don't keep track of where it gets its abilities. It doesn't work on those that don't sleep, lack eyes, are strong-willed or regularly ingest caffeine.
Morbit dashes forward and tries to bite it again. Freddy might note that Morbit is limping; that blow broke one of Morbit's front legs, and Morbit's not touching that foot to the ground.