Amphisbaenians have become one of my favorite guests on Ugly Overload. This two-legged variety is known as the baja worm lizard (bipes biporus) They are known as ajolote in their native Baja California, Mexico.
There is a legend among some of the locals that if a person sits on the ground, one of these may burrow up from the ground and enter his/her digestive tract via the...well, you get the idea. That puts kind of a dark spin on the family picnic. Stay on the benches kids. You wouldn't want an ajolote climbing up your culo.