Tomoya and Angelus seemed fine from the falling elevator, but while Youmu was used to flying, she wasn't used to not being in control of her own flight. Crawling out of the elevator slightly disoriented, she quickly got herself back under control. Shadow, Caim, Angelus and Tomoya were already up and about - she and Rainbow Dash were the last ones out.
As Angelus pointed out another minigun to Caim, who seemed incredibly pleased to pick it up again, Shadow was looking at the armoury. He pulled something out of a small white box and waved Youmu over, asking for a look at her rifle. She obliged, and he attached the thing to it.
"What's this do?" she asked. Without saying anything, he reached over and pressed a button on the attachment. A red dot appeared on the floor, surprising Youmu a bit. As she moved the gun around, the dot moved as well. She was still slightly confused, and told Shadow so.
"It's to help your aim," he explained. "Goodness knows you need all the help you can get. Whatever the red dot is on top of, the bullet will go there. Keeping it steady, though, is something you'll have to do yourself." He attached one to his own weapon, and Youmu fired a few rounds as a test. Satisfied that she'd calibrated it properly, she picked up some more bullets from the nearby ammo pile, and a first aid kit as well.