A spectator with a sign caused a massive, crazy pileup Saturday during the Tour de France.
Literally minutes after the race began ... a fan holding a cardboard sign held it out too far ... hitting one of the riders ... causing him to eat it hard. That, in turn, triggered a chain reaction as rider after rider bit the dust in a wild scene.
Here's how it was described by former winner Sean Kelly ...“The guys at the front went through a very tight section between the islands in the middle of the road and it was a dangerous one for those further back in the peloton.