In 2012, I went to Universal with my husband and tried to ride FJ. I didn't use the test seat outside, waited in line, got called out of the line after waiting about 45 minutes, pushed into the seat by a CM, and when it wouldn't click 3 times, had to take the walk of shame out the side door.
I was a size 24/26, about 315 lbs. I'm still not even sure if they tried me in the "extended" seat, or when those were installed. All I know is it was the first time in my life that I had ever not fit into a ride. I had been thin in high school, and never had issues. It was a pretty pivotal moment for me, not fitting into that seat in front of all those people in line.
Bright side, I'm going back to Universal for the first time since then in February (while I'm down running the PHM). I've lost 170 lbs and am now a size 6. You bet your sweet a** I'm riding that ride, with the biggest freakin' smile on my face.