Sea Cucumber
A lot of animals play dead to avoid being attacked or eaten but sea cucumbers take this ruse to a whole new level. To convince predators that they’re really truly dead, sea cucumbers contract their muscles so hard that some of their organs temporarily pop out of their anuses. Sea cucumbers also think this is a hilarious party trick but their friends are pretty over it.
Source: https://www.wiseoceans.com/seasense/invertebrates/