The music goes to one place and returns in another format, both shorter, faster and sometimes looping back on itself. It starts as a sequence, then moves into becoming a sort of dance track and then seems to wobble about like a badly thrown bit of pottery. Eventually bits of it make little sense and start bouncing back off the walls at you, at which point it all starts to get just a bit unusual.
Or to put it another way, Axxx2 + 2Axyxy + Ayyy2 + 2Bxx + 2Byy + C = 0.
Instrumentation: