The PC's were deep in the shit, surrounded and outnumbered by Stormtroopers. They called in their freighter for CAS, but local air space was too hot. Then, over comms they heard the sound of a fistfight on board their own ship break out. Moments later, they hear a fairly surprised, wavering voice tell them fire support is on its way.
Right after, a badly singed, damaged, escape pod crashes right into the middle of the Stormtroopers. The escape pod's hatch blasts open, and out jumps the NPC mission group's eight-foot barabel, wielding a rotary blast cannon in one hand, rocket launcher in the other, and bandolier of thermal detonators around his torso. Every Stormtrooper in eyesight starts shooting at him, and he jumps right back in the escape pod, hides, and starts chucking thermal detonators out of the escape pod without doing a whole lot of aiming.
This turns into a turkey shoot for the Jedi PC's, who just TK the thermal detonators where they need to be while the rest of the party uses the distraction to get the hell out of dodge. They get to a better position, and manage to provide enough covering fire for the barabel to make a run for it. They get into a more defensive position, and hold off the Imperials until they can get a pick-up. Onboard, they get the other side of the story.
The barabel, who frankly wasn't very smart, misinterpreted the refusal to provide CAS as a flat "we can't help you", not "we need to clear local airspace first". The barabel decided to stage a one-man rescue op, grabs a bunch of the biggest guns and explosives he can find, and jumps in the escape pod like he's Master Chief or something. The sounds of scuffling the PC's heard over comms, was the barabel fighting off the other NPC's who were trying to tell him how stupid his plan was, because they were going to have to land anyways to pick up the PC's.
So basically all he did was waste the ship's one escape pod and risk getting shot down by a TIE fighter, to make a really cool entrance and throw a bunch of random, very expensive, thermal detonators that could well have killed the PC's rather than Stormtroopers.