I agree with Percy... Humor might work best ... have him make a plan before he gets in line ... what happens if he needs to bail and that it is ok to bail out. Trying half of the way is better than not trying ... Standing in line and dealing with anxiety IS part of the experience and he is getting closer to actually " go". Even standing in line with his friends/family to keep them " company" is good. One day he'll go on the ride - when he is ready. It is hard at this age ... being a pre teen is hard enough without anxieties. I always remind my son that " a little trying" is better than not trying at all. Overcoming fears is hard! It helps to point out all the adults that are not even trying to get on the ride ;-) - kudos to your son for pushing himself!