Brilliant! They were on the same page. Sid wanted to throw things at it and Bob did as well. Actually, maybe if they threw something hard enough, they could break the glass... All right, so maybe they weren't on exactly the same page, but it was close enough. They wanted the same thing and they both had the same idea for getting there.
Sid ducked further reflexively when he heard the case throw - could it really throw them? - a ninja star at them. At Bob's gesture, Sid peeked up over the counter next and held the piece of broken stool over his head, aiming. Then, he chucked it and dropped back down behind the counter knowing that he hit his target when he heard a heavy thump of impact followed by the hiss, pop, and whir before a ninja star embedded itself into something with a thick chunk sound.
"We need to find something that'll shatter the glass when we hit it, mate..." Sid said. "That's what I'm thinking, anyway..." he added almost sheepishly in case maybe that was Bob's idea in the first place.