I went through LAX a few years ago on a medi-vac from Mexico to Vancouver. I was very sick. I was selected. I could hardly stand. The TSA guy said take my shoes off, and I said are you sure? My ankle was the size of a football. Pretty hard to fake. My fucking boarding pass was stamped MEDIVAC. I\ took my shoe off and poured at least a cup of blood and pus onto the floor. Yuk said he and "put your shoes back on". I said that I could not. More proceedures... And more...Luckily the AC delayed departure for me. Come on....