If you watch Game of Thrones, you're probably familiar with actor Hafþór Júlíus Björnsson, otherwise known as Gregor 'The Mountain' Clegane. If you don't watch Game of Thrones, you're still probably familiar with him, because EVERYONE ON THE INTERNET HAS BEEN TALKING ABOUT HIM FOR DAYS. He's an extremely large man - 6'9" of pure muscle - so it stands to reason he would be a pretty solid choice for an IRL Hulk.
In full Hulk body paint, he showed up to a 3 year old child's birthday party - and absolutely terrified the poor kid. After all, there's a pretty big difference in seeing the Hulk on the TV and thinking him smashing everything is neat, and seeing a giant muscular green man who has the capability to destroy everything in the room standing right in front of you.
Still, it seems like he's a nice guy, and the kid will probably remember this birthday for years to come.