I remember my grandpa fishing with spark plugs for weights on the Mississippi River. Sometimes grandpa forgot what side we were tied up on and he would throw his line out and get snagged in the timber on shore. He didn't want to cut it loose so he'd pull and PULL. We'd get down on the pontoon boat when that line got taunt and you'd here the snap and sometimes the whistle of spark plugs sailing by over our heads. Amazing he never whapped anyone or himself.