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One video featured an elementary school-age girl wielding a handgun; another showed a shooter using a .50 caliber gun to fire on a dummy head filled with lifelike blood and brains.

Those standards require that helmet manufacturers evaluate their product’s safety performance by dropping a helmeted dummy head made of magnesium about 6.5 feet onto a variety of steel anvils.

Facebook released a photo of a prototype in-ear monitor on a dummy head as well as a picture of team members wearing headphones that look more like Valve’s off-ear Index speakers.

“What we actually did was use a mannequin’s dummy head with two microphones in sculpted ears.”

Miss Love held up the dummy head with the pink velour wrapping, turning it this way and that to get the effect.