So I'm a really bad medic, right? I mean, I heal my teammates perfectly well, I don't really dick around too much but I have this problem with attention- I'll look around, and see a group of people split to reveal a single dude, who I'll sit and heal for a while- I mean, he'll probably go to the fight any minute now. But then I stop paying attention, just waiting for them to move...and get backstabbed.
One time, it lasted maybe 2 minutes, and I was told that he cloaked and uncloaked right in front of me. Man was my face red.