I witnessed, first hand yesterday, an interesting and relevant situation while waiting in stand by for MMRR. Posted time, 40 minutes. Line was clipping along. Then it literally stopped just as we entered the Chinese Theater. We witnessed the fast pass line fill - and I mean fill. Like over 30 groups… I looked over to try and figure out why. A CM was there to check reasons for people to be allowed to use this line - like passes for the Disability Line Option or Parent swap or guided tours( I could overhear). Everyone had a reason to be there (apparently). The frustration level between a moving line and one that stops, no matter what the reason was incredible to see among the guests who were in line. I feel for CM’s who will get to explain to “regular” guests who do not have/want to spend cash to cut line- that there is a way to “pay to play”. (Side note, is there not any checks and balance system on disability requests? Honest question, not meant to belittle legit disabilities at all- I love that Disney offers this as an option for legit disability guests)