Well, guess who I just bumped into? That's right. 
Anyways, the setting; I just finished fully topping all the last two DLC kits of the Engineer class for some tweaks. And though I didn't need to play anymore after quite some non-stop playing, I figured I stay with the pugs that stayed with me for another match. We get Collectors Jade, and of course as things start to get hairy with Collectors, pugs start dropping out. So it was just me, Turian Engineer, and a Volus. "So that's why things started going out of hand more then normal?" I thought. As in down to 4 gels and no ops packs. Then I finally see another player join. Finally! Don't notice the name at first, just just before he starts moving I take another glance and "No way?!" That's right, megabeast, also via Turian Engineer, comes riding in to save to day! He quickly runs over to where we were and just as he's about to start kicking butt, he blows up & dies instantly?!?! Man, I lol'ed so freaking loud at that sight. Good thing I didn't have my mic piece into my Turtle Beach headset.
There were many more hard lol moments throughout and at a steady pace. It really made my day.
So yeah, that match was one of those "everything going wrong" Collector matches. And also seen megabeast disable a last device all by himself with the timer hitting zero first, and still got it. That was the lowest I seen that timer go with mission successful.
Anyways, he stayed for like two more matches, plugged in mic piece for some chit chat for the next matches, but not too much as I fear it gets in the way with gaming. Then just before he left I fired up some quick question regarding ME3mp builds, Banshee warp penetration distance, and that's it. ... Only bad thing was me not getting sync killed enough so I could of better seen him in action. ... And that's that. A great afternoon for me.