At least your sole flaming Megaliff didn't get converted by an army of enemy engineers then
There is a campaign level where you land in an industrial complex that is overrun by crazy engineers who are out of control and will capture/convert anything in sight.
So I built my first Megaliff and dumped him on the front lines with a load of defence turrets...and then went to prepare some NOMS. I know the level well (so I thought) so one Megaliff can handle pesky engineers easy whilst I'm afk! I returned only to find my entire base+acu gone and a sole enemy Megaliff trampling around.
I thought experimentals weren't captureable!