My brother and I used to play a more extreme version of Floor Is Lava called 'I Can Do Something More Dangerouser Than You Can' (we have both increased orgrammar skills dramatically since the game's creation)
In our version, not only was the floor lava, but the furniture was akin to an Indiana Jones scene, requiring great leaps, twists and tumbles. Hazards were everywhere.
After one of us cleared various obstacles, the observing sibling declared ' I can do something more dangerouser than you!' followed by a declaration of what new stunt we would be tracking onto the routine. (I will flip from the ottoman to the sofa like you did AND jump onto the chair!)
The game continued like that until we got caught standing on the furniture and had to think up something new to play.
Years later, I heard the little song "Anything You Can Do I can Do Better" and I realized it was the same concept of our childhood game.
Last year, I turned 40
This year, true to form, little brother is doing it better.
He always wins this game.
14 months apart (our poor mom) I can't remember a time before he became my built-in playmate.
I hope (and often pray) that he will always, always be around to show me how to do things better.