I'd make some nasty joke about turning on a lathe with the half-nut engaged only...
I wrecked the blade insert in my table saw today by trying to tilt the blade while it was running. Not a problem when you have an insert that's designed for a tilting blade.
Good thing my head was below the table when the insert took off at 400 MPH!
Now I have to realign the trunnion. Just one of those says when you just, walk away.