Lol, it's for the clanking of the weights guys he doesn't always do drop sets but he usually does space the plates. Don't we all have our quirks in the gym, for instance sometimes I lift at "the rush" and they have plates with different colored coating on them. Sometimes plates of the same weight have different colored coating and I just can't bring myself to have a red 45 on one side with a green 45 on the other. As a matter of fact that should be a thread.