I don't know how much different the chippers today are, but the one I used a long time ago to clear out the area for my dad's barn, would rip the branches out of your hands as the feed rollers got them, and in a flash they would be gone.
You really needed to wear gloves, because it would sting when the branches accelerated out of your hands. Occasionally, the gloves would catch on something as it went flying by you. Or, a branch would push you in the direction of the machine, those would get your attention.
Surprised there weren't more accidents than there were.
I have noticed they generally have a stop bar that runs across the top of the intake chute now.
You really needed to wear gloves, because it would sting when the branches accelerated out of your hands. Occasionally, the gloves would catch on something as it went flying by you. Or, a branch would push you in the direction of the machine, those would get your attention.
Surprised there weren't more accidents than there were.
I have noticed they generally have a stop bar that runs across the top of the intake chute now.