1) Guardian Angel. (Shady story time.)
So I was carrying a couple of leeching schmucks through a mildly laggy FB Reactor/Geth game with my trusty Saber GE and our 4th person was alternating every few minutes. Then around early wave 7 this Black Widow QFI drops in and settles into the notorious sniper spot near the LZ. At this point I wrote her off as another liability that would do nothing other than mess up spawns and occasionally take pot shots... man oh man was I wrong.
So it's mid wave 8, the leeching schmucks have bled out (obviously) and I'm at the far side of the Reactor clearing up a Geth spawn. I deal with the Geth but run out of bullets and have to reload. I start reloading, check my flanks (carry over habit from other FPS's) and just as I turn around I get shot and staggered by a Hunter (which also meant that I was SOL as far as reloading goes.) I try to get away but get shot by another Hunter behind the first one. Oh and if that wasn't a big enough f*ck you, there's a Pyro that's only a few meters away from melting my face. As I was prepping a missile to nuke the sentient toasters off of me after I gel, the Pyro gets sabotaged, one of the Hunters has his head taken clean off and the other gets shot and staggered. Giving me just enough time to overload em both, sneak in a reload, take out the Hunter and watch as the Pyro's stupid yellow metallic head turned into goo.
It was one of those times where I had to drop everything for a solid 5 seconds and think " Did that really just happen? Because that was goddamn awesome. " Friendly long distance light melee given, friendly long distance disruptor omni tool received. It was glorious. Ended up a partial extraction with one of the schmucks not making it. I wanted to send a friend request afterwards but the host bailed on us before we got to the lobby and I couldn't remember the name. 
2) Roflstomp.
This wasn't really a pug, at least not according to my definition of a pug, but it was my last game for the night, came right after the one above and was also a fairly epic game. Got invited by Amaeth for a platinum game. I then invited N7 Praes and our 4th pug was a very competent Piranha GI. Long story short- chit got rekt, fun was had. 10/10. Good game guys. 