<< *note* don't order this drink it is a half shot of everclear and a half shot of 151, in a shot glass >>
Do bars even stock everclear?  That'd almost be a liability for them to serve it.  I remember making daqueries with 2-3 shots in them and feeling drunk after 1/2 of it.  We called those "panty removers", because you couldn't taste the everclear, you just felt this warm feeling in your stomach.  
I was going to suggest a Cement Mixer, but azazyel beat me too it.  Either way, that's a nasty prank to pull on someone who's drinking for the first time.  You take a shot of lime juice, keeping it in your mouth, the take a shot of bailys irish creme.  The lime curdles the creme, leaving a nasty blob in your mouth.