What is the most interesting species you've found while herping?

[Pickle-cham]

I'd be afraid to even touch something like that for fear of having parts of him fall off

They have evolved too not have legs, the dropping of tail or caudal autotomy its proper term is a defence mechanism. The tail carries on wiggling for some time afterwards to keep the would be predator occupied while it makes its escape.
They are practically harmless otherwise and pray on slugs mainly.