As long as you can throw a dart with your left hand and hit the bulls-eye from 30 yards you'll be okay. Also, know how to explain why you want to be a dentist in at least 3 languages (1 has to be in Arabic). And my favorite part is when they time you to see how fast you can tie a knot in a cherry stem with your mouth, it's indicitave of how you will perform on the boards. I did hear of a kid who had to run 40 meter sprints in the parking lot while dodging in and out of cones but he got hit by a car so I doubt they still do that. Just relax and you'll do fine. They are sincere and want to get to know you. Good luck! (bring running shoes just in case!)