President Obama gave all the kids the presidential seal of approval as he checked out the projects at the White House Science Fair, but when it came to Joey Hudy's Extreme Marshmallow Cannon, he insisted on actually testing the thing out.
14-year-old Hudy seemed a bit surprised by the request, but started to fill up the reservoir using a bike pump. Then to speed things up, the President stepped in to help, and cleared a path through the assembled press for the marshmallow missile.
As President Obama points out, "the Secret Service won't be happy about this." Luckily nothing appeared damaged by the flying marshmallow.