“Acid-squirting land lobster from hell”

… which could be:

A new horror film

A new rock band

A real thing in Big Bend National Park

It’s not as bad as it sounds. (I just love sensationalized headlines.) The acid they squirt is basically common vinegar, harmless to humans, so they sort of make their own hot and sour lobster soup. They are not lobsters, of course. “The whip scorpion, more commonly called a vinegaroon in Texas, is a member of the arachnid family but poses little danger to humans, unlike its cousins, the scorpion and the spider.”