This is something I've never seen before. Two UA 777's were instructed to position and hold on both 28L and 28R simultaneously. I was hoping they'd drag race down the runway :) But N219UA on 28L was cleared first and N206UA on 28R about 3 minutes later. I got an email from Keith, the ATC on duty at that time. He said that the basic rule at SFO is to never load both runways simultaneously. But both 777's were ready to go and there was no aircraft on final so he could load both runways.