not ingoring the person who you are spotting... i hate the guys who say how many reps, when i was trying 5x5, i would be like uh just 5 reps, then i would do them and they guy i asked once to spot was like come on you can get 8 or 9 push it and he physically pushed the weight back from where i was going to rest it made me fail at about 8 reps and i was like wtf man i wanted 5 i gotta do another 3 sets of 5 reps?? so yeh people who listen to their partner is important.