During my apprenticeship:
Workshop. Huuuge pillar drill.
2 levers, 9 speeds.
Big sign: Change speed only at standstill.
Moron fumbles about levers, starts drill.
Gears weren´t engaged properly, so there was a loud noise.
Instead of switching the machine off, waiting for it to stop and then push the lever back, he grabbed the lever and pushed it while the motor was running at full speed.
There was a loud bang.
The shock could be felt through the floor......
If brute force doesn´t work, you´re just not using enough of it!