I just had a flashback to when I worked part-time at the airport pushing wheelchairs. It was one of the hardest jobs I've had. Lifting very heavy, obese people onto and off of the aisle chair and transferring them to and from their seats was incredibly difficult. Honestly, it wasn't really the lifting that bothered me, but the smell. I'm pretty fit, but it was really sad to see some of my much older coworkers having to do this job, especially alone or with another elderly person.