Two aliens landed their spacecraft in a deserted part of the Arizona desert late one night. Being after closing time they found no humans around.
The younger alien walks up to a gas pump and says: "We come in peace, take us to your leader".
Getting no response he again demands to see our leader.
The older alien says to take it easy as the gas pump might not understand us.
The younger alien again asks: Take us to your leader or I will zap you with my ray gun".
The older alien says: "I don't think that you should do that".
The younger alien does not heed his elders advice and zaps the gas pump with his ray gun.
There was an immediate explosion that blew the alien back 100 feet and left him burnt and unconscious.
A half an hour later when he came to he said: "That thing damn near killed me, how did you know that he was so dangerous"?
The older alien said: "In all of my intergalactic travels I have learned not to mess with someone who can throw his penis over his shoulder and stick it in his ear".