This weekend at the Dallas Comic Con, Stan Lee spilled the beans on exactly what his cameo in The Amazing Spider-Man is. He also confirmed that the reason he doesn’t have a cameo in X-Men First Class is due to them filming most of the movie out of the country. In regards to the Spidey cameo, it’s been known for a while that it was part of an action sequence; although until now the details have been unknown.
When he first began to describe his cameo (which you can see in the video below), I was immediately reminded of a somewhat similar set up in Indiana Jones and the Last Crusade. But as he went on to describe the scene, in detail, it turns out to be different and sounds pretty funny actually.