Im going to rant:

What is it with people who dont know how to spot? I usually lift by myself and I have to ask someone i usually dont know for a spot. I try to be nice and say "if I do need help just give me the slightest help possible"

Then I will be on my last rep, pushing as hard as i can and I will stop about middle way and they will use too much force to lift it up and the last rep was rendered useless. Thanks alot