yea, they shouldnt have tripped...sounds like ego problems to me. i mean ive been training on and off for 5 years and have never had that problem. i tend to approach it how brandon does though. i like to go to a new school and get new looks and ideas. i like to try to take the match to each position and see how they react and see what moves they choose to make. no one rolls the same. occasionally i do like to test myself and will ask the person im rolling with if they will go a lil harder and they usually dont mind. i do think you should tell them your experience level tho. it just makes it alot more friendly. imho.