The President meets an 8th grader named Joey from Phoenix, AZ at the White House Science Fair and the two launch a marshmallow across the State Dining Room of the White House with Joey's science project—an air cannon.
Screw the kid. Obama only had eyes for the marshmallow cannon!
Joey: "I use it to shoot marshmallows."
Obama: "Shoo—shooting mars*CAN WE DEMONSTRATE? [...] Would it hit the wall? Would it stick? Let's try it. Let's try it up!"
Then, after some joking telling people to back off so they don't get hurt, he seems genuinely excited:
Obama: "[laughs] This is great! [...] Secret service isn't happy about this."
Then he pumps air into it, the kid launches it and Obama screams "WOW! OOOWOW!"
Yes, I love to see the most powerful man in the world shooting a marshmallow across the White House like a little kid.