Cool! I tryed to do something like that but it ended up in an EPIC FAIL!!! you made this thing almost perfect!!!!! Although some hydrolic fluid came out, this power shovel did the job
well, not really infinity.
there are 2 things going on in here:
1. there are little spaces in between the teeth of the gears that are slowly closing in
2. the gear ratio is being changed so much that the last gear appears to be still, while the spaces in the teeth are still being closed in.