I worked for several services in the F&W #30 years. The policy of the service I worked for the longest was that we had to leave the cot in the down position whenever a patient was on board. When we got to the ER or bed in hospital, etc. we lifted the cot up to slide the patient over. Reason for this was a coupe of situations where a top heavy cot with patient tipped over. Saw it once myself, hard to forget!
Wow, I never thought of that before! But that does make sense though, especially if you've seen them tip before if they got too top heavy in the all the way up position. Probably not easy on your back though if you were required to leave it in the lowest position and had quite a distance to travel from the Emergency bay to the E.R. treatment room!
The only cot mishap I was involved in was a one-man cot on the volunteer EMT-Basic ambulance service I was on in the early 90's. A guy got stung by a bee in the middle of nowhere and was already in anaphalactic shock by the time we got there and was unconscious. There was already a Sheriff deputy on scene, he was a young guy apparently a newbie and boy was he freaking out (the patient's wife was more calm than this deputy was lol). He was radioing us every minute or so asking our ETA, and flat out telling us "this guy is in bad shape" on fireband. Anyway we get there, see the guy unconscious and barely breathing with a thready pulse and dropping B.P., we slapped a non rebreather on him at full O2 since that was all we could do as an EMT-Basic level service, and get ready to load and go...we already had CGH Emergency Services (back then they were still called Twin City Ambulance) en route to meet us so their Paramedics could jump onboard and start ALS.
Anyway we're getting ready to load this guy into the rig, the deputy all but peeing his pants, I was at the head and the deputy was at the foot end (my partner, a 5'2" lady who maybe weighed 100 pounds soaking wet was ahead of me to guide us down the stairs and carry the crash kit and O2).
We line the cot up to the back of the rig and I'm getting ready to move around to take the deputy's place to push it in, but before I do the panic stricken deputy pulls the lever before we even get the cot wheels on the floor of the rig, which of course causes the cot to come crashing down, with our unconscious patient on it of course. I, still at the head end, grab hold before it can hit the driveway, and let it down gently. But I was sore for a week afterwards!
Our patient was a big guy, probably over 200 pounds, and that was the worst mishap I've ever been involved in with a cot. The volunteer service I was on had various mishaps with it though, several times it would buckle and crash down if they didn't pull it up all the way, to the extent that we would never let go of it until both of us heard it click because it had a tendency to not "click" or snap into position. Plus, it only had two positions: all the way down, or all the way up...take your choice.
Never did like those one man cots, give me a FW #30 any day!