Also, i should probably describe the state of the caverns/ex subway they were in:
With all the eggs, it has become sticky and slimy, and the walls seem to drip from moisture. Also, it is much warmer and filled with a humming noise. With the small insecticons flying around, there is the sound of wing beats and alien streaking every now and then. It also probably smells like rotting flesh and sulfer, or some awful combination like that.