ok well ive got two more, both from me 1 and both featuring wrex
I was on one of the unexplored worlds with wrex. I got out of the mako with enemies nearby and he began firing his shotgun, which was the weapen he must have been equipped with since it was the first time i had gotten out of the mako on the planet. anyhow, he continued to fire after every enemy had died. and....he wouldn't stop. I got in the mako, and i still hear the fire of the shotgun as often as is possible to pull the trigger. I get out, swap his weapon for the assault rifle, he takes his AR out and keeps firing shotgun blasts out of it (no enemies anywhere). I finally got him to stop by re-equipping his shotty, this even after a load point.
the second, on vermire when he is is all pissed about saren and the genophage, he stands off to the side and shoots his shotgun (coincidence, idk). but when he fires it, it is reeeeelly loud! like when i'm talking to other ppl around the salarian camp, I can't hear them cause the sound of BOOM BOOOM BOOOM overpowers everything they say. thats one hell of a shotgun he's got, but i shouldn't be surprised its the spectre master x shotty