My error , he did strike feed off tongs a few years ago , I was holding him though . He was such a great feeder I just wondered if he'd strike whilst outside the viv .
I only did it once and always use tongs as a rule .
That said my adult Corn snake has in the past eaten OFF my hand but he's a special guy and has never struck , he just slides through the mouse like a whale feeding on plankton- very slow and gentile feeder .
I would never recommend this to anyone else . You just get to know your snakes over the years .