Very interesting, didn't know moles were affected by explosions.
If you synchronise your worm's 100% vertical backspace jump with mole release in a tight tunnel, the mole might even push your worm down the slope. Such mole might later have a slightly modified dig.
Trivia: mole hitboxes seem to have only 2 pixels of height
As for the video, Lupastic is 100% correct. Mole Squadron never behaved like this prior to the last updates.