Supreme chair at Alta without safety bars was a trip, the few times we've been to Alta (3x); climbs that ridge-line for a long time, with trees below lift riders right and falling away feature below lift riders left. Read somewhere that all Alta chairs now have safety bars, so much for the theory that a lot of locals fed me then "no safety bars is safer than having safety bars" just after a kid fell off 40 ft into a dip right after the start of the chair to Supreme, I forget the name. It was sadly funny then. Kid recovered after a long hospital stay, was on the lift with his mom.
The Leissieres express in Val D'Isere even with bars was unnerving when it goes over and in our case, introduction was into nothingness; I can only imagine what it was like when there were no bars which I understand was not that long ago; we had avalanche bags on, could not flip them over or did not, but pushed that rear onto lip, not a fun feeling that morning...
It's in our trip chronicle video : intro to the Leissieres chair : 1'32"-1'36" , and it's shown later in bright sunshine in the latter 1/3rd of the video.
And when I was a beginner skier, two years or so into it, this scared me the most, watching one's kid who is all off 7 years old solo on a rickety 40 year old double with bent safety bars - and he insists on sitting on the lip! L'Espace Killy had this amazing stopper built into the lift where all under 1.25m had to sit on, so they could not slip under! Cool device, made parents feel so much more secure and kids just safer, no falling out under the bar, and those lifts are often at least 40 ft to 80 ft in the air if not more in some cases, I thought more than 100ft but I did not measure them naturally.
Kid giving Dad a heart attack just watching: (great lifties though)