Video: To ensure the foam fire suppression system actually worked before bringing aircraft into its new helicopter maintenance training facility, safety personnel at the Fort Indiantown Gap Army Reserve base in Pennsylvania performed a full-scale test of the emergency equipment. But I can't understand why no one is running through that hanger like a kid in Willy Wonka's factory.
The foam is typically used in facilities where there are highly flammable liquids, as it helps to smother mixtures such as fuels so that oxygen can't reach and feed a fire. But in this case there's no actual fire, so the hanger looks like it's filled with whipped cream cannons run amok. It's just too bad the military frowns on having fun.