My favourite Tali moment so far was in this adept playthrough, I was on Feros doing the random missions for the Zhu's Hope people. I went into what turned out to be the door that was where the Geth transmitter is, but was at the top of the passageway just checking my equipment and setting myself up and stuff. Out of nowhere, Tali goes blazing past Shepard and Ashley with her Pistol out, and runs off into the next room. I was pretty blagged and thought "shiet, better get in there", ran after her and as I came around the corner I saw her vaulting over this bit of cover, right into middle of her favourites, three random Krogan.

The Krogan were standing so they formed a triangle pretty much, and Tali just ended up smack bang in the middle of all three. And then they just all stood there for about 5 seconds, staring at each other, while I was being highly confused. Then out of nowhere, all three Krogan pull out shotguns and completely wreck Tali, instant death. So then I have to kill them and whatever else was in the room with just Shepard and Ashley which was a pain in the arse, I didn't have unity at this point of the game. Anyway after they were all dead and Tali revived, she just wouldn't leave her spot. She stood there rooted to the spot where she died, looking at the ground, like she was in total shock that her beloved Krogan friends had blown her away, and when she woke up she found that they were dead and gone she couldn't bare to leave. I ended up having to go all the way back onto the Normandy and back again just to get her to move again.