Keep your hands and feet inside your Universe at all times

Star Trek. "The Alternative Factor"

AKA the one where Lazarus goes, "AAAAHHHHgggghhh!" as he falls off a cliff. Several times.

Really, it should be a drinking game.

Disclaimer: Star Trek is Copyright 2009 and a Registered Trademark of CBS Studios, Inc. Marvin the Martian is Copyright 2009 Warner Bros. Entertainment. No infringement of these rights is implied.

Thanks to Trekcore.com for the Star Trek screencaps.