Okay, so this amateur, UFO-shaped balloon was flying over Colorado, possibly with a 6 year old boy inside. I flip on CNN and their "expert" is talking about how he has been doing calculations, using "high school physics" and he reckons it would take 3700 grams of helium to lift a 50 pound boy.
Dude, 3700 grams is equal to just over 8 pounds.
Go back to High School.
Where the hell do they get these "experts"?
I used an app on my android phone to figure that out. Took me about 10 seconds.