ROBERT DOWNEY JR. is in Massachusetts filming a new movie, and Heather Denno brought her one-and-a-half-year-old son Jaxson to meet him, because the kid is a HUGE Iron Man fan. Unfortunately, Jaxson didn't realize he was just meeting Downey and the disappointment CRUSHED him. He started bawling.

 

Heather tells People, 'He was fine as soon as he talked to him. [Jaxson] was so confused because I kept telling him it was Iron Man and he knew it wasn't. Well, not Iron Man in the suit.'

[PEOPLE]