When the team visits the moon, it's a full moon. When they're on the moon, it's a full Earth in the moon's sky. The sun can't be fully illuminating both. At least one must be in shadow (presumably Earth).
Ben releases objects from his pants pockets by shakin' his booty. Presumably, he's wearing jeans, which -- try as one might --objects can't be shaken out of. Besides, his pants has no visible pocket lines for there to be pockets.
Out of Ben's pants falls multiple objects including a container of alien acid which is slightly bigger than Kevin's hand -- too big to fit inside of pants (and too dangerous as it can dissolve metal instantly).