Yeah, no kidding! I was doing ab work on a crunch machine... Did 3 sets, was squating next to the machine between sets 3 and 4 writing my reps in my folder, and this lady climbs on the machine. Ok, annoying, but I'll let her work in, but she didn't even ask... I stood there kinda glaring at her, right next to the machine. She finishes her set, and just sits there on the machine! I'm like "Excuse me, I have 1 more set". She tells me she's not done, she has 3 more sets! So I made her get up and let me do my set - she said she didn't realize I was using the machine??? WTF? Anyway, then she wanted to chit chat with me about how much weight I was doing. Ugh.