It's not uncommon for fans of celebrities or athletes to get duped into thinking they're hanging out with the real thing when they clearly aren't. It's simple: if you want to believe in something, your brain has a funny way of convincing yourself that what's happening is indeed real.
This one is pretty bad, though.
Milwaukee Bucks forward John Henson, who is 6-foot-11, apparently has a reasonably tall man pretending to be him and taking photos with unsuspecting fans, despite the fact they look nothing alike. Again, some people just want to believe.
Check out the photo evidence, via John Henson's Twitter account.