Being away from the bar, Marta has no idea who's down. So, he presumes that everybody in the bar hears a strange whining noise from outside. If they'd have look out of the window, they'd have seen a 2-Seater X-Wing crash into the bar. Well, one of the seats ejected shortly before the crash, along with a little R2 unit.
The entire structure collapses, leaving only a large bar counter remaining in the pile of rubble. The only person who is hurt is Marta, who is concussed for 3 rounds.