This is a shot of Stan Lee posing with a bunch of lady cosplayers at the Wizard World Philadelphia Comic Con and the shadow of Thor's hammer making it look like he pissed himself. He didn't though, so it's all good. Or -- OR -- is Thor just covering for him? I'm joking, there's no way he could have pissed himself with all those beautiful women around because every man knows it's nearly impossible to pee with a raging boner.
Thanks to ChaosLex, who pees his pants by choice, never by accident.