Chest-Bursts on LV-223

So, I was rifling through Sergey's wonderful collection just now, and I hope someone can pull this pic for me.

We already know that there were holes in the other 3 cryo-chambers. I had assumed chest-bursting,naturally but exploding heads or whatever was always an option as well.

Just what the hell happened in that pilot chamber?? Had our remaining Engy sabotaged the rest? Had they all become impregnated or infected somehow?  It seems that thanks to this gallery, we may get just a glimpse into wtf went down.

I am limited to my phone and don't have a means of adding pics because I'm dumb, but click the link to 'Another Site' and check the 2nd Gallery from the top in the left column- There you will see dead Engineers being loaded into the tubes, prior to filming, ribs torn wide open; clearly having been burst out of.

numerous shots of dead, rip-splayed Engineers in cryo, as well as a few of our Remaining Engineer and a random fellow Engy, fiddling with cryo-tubes and other stuff. 

This is all I've seen so far, but I would say this should lay to rest any doubt as to whether or not Aliens of some variety burst forth from these 3 at least.

What do you guys think? 

PS- if anyone is able, please add a pic or two- Thanks Guys!