As part of her noble initiative to fight childhood obesity, first lady Michelle Obama gathered 450 kids on the White House's South Lawn on Tuesday in an attempt to break the Guinness World Record for the most people doing jumping jacks in a 24-hour period.

Yes, there's a record for that.

The idea was this: At 3 p.m. sharp, children all over the world would jump and jack to their little hearts' desire. And as long as at least 20,500 kids took part, they'd become the new record-holders.

But the little ones in Mrs. Obama's presence were so excited that after their perfunctory participation, they bum-rushed her and almost knocked her down, causing the Secret Service to sweep into action.

See thousands of kids lose their minds over simple calisthenics below: