Nearly crashed my denford triac machine and not sure what went wrong, help please?

[JAZZCNC]

I have seen that happen to me in 2 scenarios.
-while when machine is cutting i forget about that and cut something with the plasma cutter outside the room.

Get your self a Cslabs controller.!!!. . . . I can cut with Plasma, weld with TIG or Mig right next to my machine while it's cutting and it doesn't even flinch.!!

-i have one slippery, to say, collet for my 3mm bits. Some times i will not tighten it well, so the bit would dig and make something like that. but this machine is flimsy so i dont know if that could be your case

That crossed my mind Boyan but Wouldn't explain the shift to right thou would it unless it stalled motors first then ploughed on thru. Only Suesi will know for sure if he watched it close enough.
Also the cutter would be stuck out further from collet which would be sign. As would it not going back to same height or back to zero in Z but he didn't check that I've already asked.!