So I am finally going through the copy of Helena I bought on Desura last summer that I never got around to playing as I had mouse issues at that time, and I am stuck in the Crystal Caves level. Unfortunately no one has wrote up any guides for the game.
 
I get passed the first two areas fine, and I manage to navigate the spike tunnels alright, but upon doing so I encounter a block pyramid that blocks my progress. I have tried all that I can think off to get passed it but to no avail. For instance, I tried leaving the tank and going on foot, which was a bad idea as the fall from block to block severely hurts the player character and he died almost immediately on the way back down. I have also tried shooting it, turning around to find another way, and tried bashing my head against my desk a few times.

Now, I do not know if I am just being dense or not, but I am truly stuck. Any suggestions?