Sea Cucumber question?

[55reef1146]

I'm pretty sure it is, but is it normal for a Sea Cucumber to expel some of it's guts?

 

[tao chuan fa]

When threatened, some sea cucumbers discharge sticky threads to ensnare their enemies. Others can mutilate their own bodies as a defense mechanism. They violently contract their muscles and jettison some of their internal organs out of their anus. The missing body parts are quickly regenerated.

http://animals.nationalgeographic.com/invertebrates/sea-cucumber/