What Makes a Sport?

Game stand in one leg competition
“I mean it, guys,” I said. “Why don’t you play Two Foot Trivia instead? It’s just as fun and much safer.”
“First of all, this is completely safe,” Grayson replied. “Second, if we had both feet down, we’d just be asking each other trivia questions.”
“Which would be lame,” added Alex.
“But isn’t that what you’re doing right now?” I asked.
“No,” Grayson said defensively. “Balancing on one foot makes it a sport.”
James Ponti, Blue Moon

What do you think?