Random screen flashing mid-fight; need advice

So we had a five-person team tonight running through an outdoors "find 5 hostages" mission involving freeing people from Nemesis in another world tonight. It's a 2 hour timed mission.

At one point, after about an hour and ten or fifteen into the mission, my girlfriend noticed some brief, considerable flashing on her laptop's screen during a particularly busy fight. We were reasonably close to the Blue Wall. She was, if I'm right, surrounded by a lot of Nemesis goons--Jaegers and Lieutenants. She was playing an ice/energy tank (I think; she has ice armor, and her punches stun people). There was an ice-slick-slinging empath on the team in the vicinity.

She's worrying that her laptop might be damaged from a short drop earlier (around 4:30 p.m. Eastern time on Friday the 16th). I'm insisting that if her computer (a new Asus laptop less than a month old) were damaged, it wouldn't have started up and/or run Windows 7 properly (we tested the machine and COH almost immediately after the fall), or it would have been giving serious issues long before one random fight in about four or five hours of playing (and, yes, we played for about 30-45 minutes after with no further ill effects).

The game displayed fine tonight other than this single fight and other than some jerkiness/lag stuff. Sound worked fine. The game apparently ran its usually smooth self overall.

I can't really give specs for her machine or anything--I'm no tech whiz, and her comp is in her car on the way home right now, so I can't say about model numbers or anything--but. . . it SHOULD be ok, overall, right? wrong? Is it possible that she just chanced on a so-called "perfect storm" of visual effects and we're jumping at shadows?

The only thing that might have been an issue was that there was a small, plastic thing--maybe almost credit card sized?--popped out of the front left corner of the laptop's side after the laptop fell (front left facing it like you're going to use it, where one's left hand might rest at the corner). That small plastic thing slid right back into place no problem, but we don't know what it IS.

Got any insights or suggestions? We're going to try to keep playing the fool out of her machine this weekend as time permits to make sure everything's good to go, but any reasonable input (even given this limited information) would be MUCH appreciated. The laptop's new, as said, and cost close to two grand, so she's rightly scared about this.

I think more computer information is needed.

Please run and post the result from CoH Helper.

Thanks for the input! We'll keep our eyes peeled for further developments!