I used to be the OIC of the vaccination team an Army Reception Battalion.
Those who served remember going through the gauntlet of air guns shooting vaccines into your arm?
We had gym mats on the floor because every day a couple of trainees would have a vasovagal reaction (faint) and do a face plant. It was all very dramatic.
What fun. In my case the tech with the gun was busy talking to his buddy about something. He didn't hold the gun straight and managed to rip open a nice gash in my arm. But I didn't faint. ;-)