Your hands will smell bad for a couple of days but DO NOT use a glove that can get caught in the spring (shaft).. Examples that get caught are thick rubber or neoprene, cotton or leather. It will curl you up around it and keep going. You can use thin plastic or neoprene gloves that aren't too tough to tear, but my experience has been if they are easy enough to tear in case they get caught, they won't last very long anyway.
Don't let someone else operate the foot switch. The operator should be the only one in the area.I've had people accidentally step on it and start the machine unexpectedly.
Most have a reverse function, so if it hangs, it should come loose.
If you are concerned about getting stuck, use the smallest bit attachment and work your way bigger as needed.
Good luck and hope it's not a tree root.