British Knights (Dimacells?) I got in 1989-90 since they would make you jump 1" higher from the TV advertisements (green gell ). Then my friend was like BK stands for blood killer. At the time I didnt know what a blood was, but apparently it was banned in a few states at the time. I do want to get a pair of those Dimacells now, but there is no telling if people still held on to them.