Yeah. The best-looking PT in my gym (his body damn huge and well-shaped) even gave me the wrong advice, although he looked sooo credible. When I first started I once asked him how to breathe during execution of bench press and he told me to breathe out while lowering the bar and breathe in while pushing it up. He even proudly demo-ed it to me, breathing out loudly while lowering the bar and sucking in air while pushing =.= This same PT also told me that I should always do my workouts in xx reps, as though it is a fixed rule which I must abide by at all times, which is stupid, since different rep ranges serve different purposes.

Another female PT (she's quite hot) taught me how to do the smith squats on my first day at the gym. Wrongly. Told me to ensure my back is straight (perpendicular to the floor) at all times and that my feet must be positioned in front of my body so that when I was at the bottom of the squat motion my abs and quads will form 90 degree angle, and my quads and lower leg will form 90 degree. I was like wha...? So different from the squats I read from Rippetoe's. And she also told me that I cannot do free weights until I am stronger. Told me to strictly stick to machines only for first few months. I just ignored her advice lol...
Yep, minus the know-it-all part.    The part where he talked about the carnivorous animals was really absurd though... wonder how he came up with that idea.

Exactly... it was only possible when you have something like the smith bar on your back to lean on. And the best part is immediately after she left, I went to ask another PT if what she taught me was correct. That other PT said she's teaching wrong things. Swt.

Err bench press I think there's a small gap in between my lower/middle (not sure which) back and the bench, and I tighten/squeeze my lats moderately throughout the exercise as well (read it somewhere that it should be done that way... Rippetoe's I think?).