Bruce moved to effectively stand on Clark's feet, just because there was no way he was going to tolerate effectively dangling by one arm. It wasn't comfortable, and it wasn't controlled enough for his tastes. So he did something about it.

He watched the alarm fly off into the distance and waited until he saw the shuffling forms move after it, though his eyesight being human meant he didn't exactly have a clear view.

"Flash bang grenades."

Were what he needed to manufacture.