Poor 18-month-old Jaxson Denno was told—by his own mother, no less—that “Iron Man” was shooting a movie near his house and they were going to drive to the set to meet him. You can imagine young Jaxson’s heartbreak upon meeting, not Iron Man, but some loser named Robert Downey Jr. instead. “He was fine as soon as he talked to him,” Jaxson’s mom assured People magazine …
