Trainers

So I've been trying out a new gym across the street from my work for the last week - convenient but not cheap - what will win out? Anyway one of the trainers - large black man has been pestering me about where I go and what am I looking for in a gym. Well he started out with just chit chat and then said he would give me a session sometime this week; we determined it would be today @ 7, so I got in about 10mins to 6, he said I should put my stuff in the locker and hurry back over to see him. Well I ran into a co-worker, stopped and chatted for a minute. He comes over a bust my chops - I told him to simmer down he fired back if I didn't want this then he would move on, he said he was busy too. Well then I got a little short with him back and said, "if you need to go then go, I know how to workout". Well next thing you know he is challenging me and say, "I really doubt that". So I start working out with him and he tells me I have a bad attitude and negative to him in the morning - I come back and tell him it takes me 45mins to get here and he is too sensitive. Then he says that his knee is swollen and in pain, I immediately think to myself, well why are you doing this, go sit down an ice it. Well this large man did work me a new one and my legs will most likely give out but is that really the way to treat a potential new client?