Which Came First? The Chryssalid or it's Eggs?

An often debated question to be sure.  I pose that it doesn't freakin matter because these things are TERRIFYING!!!
And you thought that your squad mates stomach cramps were just pre-mission jitters.
I made a good many of the Chryssalid animations for XCOM: EU and my favorite has to be this little number shown below.  It pretty much sums up XCOM for me.  You start your mission in a good place, best intentions in mind, and then BOOM!  Chryssalids swarm in around you, and all your buddies turn into an exploding sack of flesh.
Just run back to your Drop Ship, crawl into a nice drafty corner of your Barracks, and pretend everything is going to be OK.
...Until the next mission.  :)

Watch test animation: