On a French study trip, one of our group usually got around fine on crutches, but for extended periods, would use a manual wheelchair. Hence on this trip, her chair came along. The Paris Metro is not very wheelchair friendly. No problem, it was negotiable by stairs on crutches. Due to the lurching of the Metro, she preferred to stand rather than risk being catapaulted out of her chair. So someone else sat down in the chair whilst we were in motion. On one of these trips, one of the prettiest girls in our party was sat in the chair when we got to our station. Before she could get up, two men leapt up from their seats to aid this attractive young lady who was apparently suffering with a long-term disability and lifted her, chair and all, from the Metro to the platform whilst we concealed our laughter. Thanking these two men profusely, she then had to sit in the chair until the train had pulled out of the staion and all the other passengers had left the platform before standing up and pushing the chair to the ticket barrier.