AL

Weird Al Yankovic was just involved in a three-car fender-bender in Hollywood -- not too weird considering people in California suck at driving in the rain. 

It was a simple chain reaction -- a taxi cab rear-ended a car that rear-ended Weird Al. 

We're told everyone was fine and the people involved even exchanged information before going on their separate ways. 

A witness on scene tells TMZ Al was especially cool, calm and collected after the crash -- and was even waving to fans.