guy was a dick. you should have move all "his" plates to the other machine.
I had a similar experience the other day, i walk to the cable machine, no one is around. It my first exercise, so i selected my playlist, wrote in my workout plan into my log, I change the attachment bar, change the weight, manage to do 2 sets. Then some guy walk over from the leg machine area and said," i was using that machine." I like, " i did see you near" He said," did you see my cellphone?" he cellphone was hiding under the machine

. Im like, " im sorry do you what to use it, i can use the one next over" he said no, he would come back later.

WTF some people just want to start shit.