I once used my mom's sterling silver butterknife and stuck it in a 120Volt receptacle. Once I recovered, I then used a coat hanger made of plain junk steel wire. I definitely got the biggest effect with the butter knife. I guess it is possible that I was used to the effect on the second attempt and did not fully appreciate the subtle differences in the ringing in my ears, but I have to go with the butterknife on this one. The other thing I remember clearly is Mom's shock when she found out that one of her butterknives was badly tarnished and slightly shorter than the others. She never forgave me.