Eric Lindros had eight concussions and had his toughness questioned by Flyers GM Bobby Clarke. Lindros had his captaincy stripped from his empty uniform when he disagreed with the team's medical staff about returning from a concussion in 2000."It's funny, you break your leg, you know how long it takes for a bone to heal," says Lindros, currently the NHL Players' Association ombudsman. "You'll know how long it takes to come back. But what we don't know is what goes on in the head because it hasn't come to a science."