actually i think high speed bails are sketchier on skateboards, because you have to start running. fast. and if you land with one foot on the board, you can kiss your hamstrings goodbye. thats a pulled groin right there.
skates you can slide, and mush around landings, and even hockey stop if you know what you're doing. but on the other hand you can also slip out and backslap or faceplant. pretty much anything where you're going fast on concrete is deadly.