For most of us, our first introduction to aluminum is aluminum foil, or tin foil, as it is sometimes called. So for me, aluminum was something really thin and flimsy. I was really surprised when I learned that aluminum is a kind of metal and that, when used in things other than tin foil, it’s actually pretty strong and sturdy.
So this joke made me laugh. Iron Man, the beloved superhero from Marvel Comics portrayed by Robert Downey Jr., lives up to his sturdy-sounding title by always stopping the bad guys. If he had a partner named Aluminum Man, perhaps the best he could do is “foil” the bad guy’s plans. I do love a good pun.