It wasn't the smoke that was the point so much as the bang, which at least distracted them. Or so Bruce had hoped.

"Loud and sustained." He considered the question and then - "Maybe." He wasn't exactly prone to making loud noises and drawing attention to himself, but with a little bit of work he managed to come up with something.

Which amounted to the parts from a security alarm he hadn't done much with but had intended to. Fishing them out and getting them activated wasn't overly hard, but he stopped short of the throw. "You have better range. You toss it."