Getting Wired

A guy walks into a bar but is stopped by the bouncer.

"I'm sorry, I can't let you in without a tie."

The guy goes back to his car and looks for a tie, but all he can find is a set of jumper cables. So he ties the jumper cables around his neck and heads back to the bar.

The bouncer looks him over and says, "I'm going to let you in. But don't start anything."