did one in the late 60's as a volunteer for a ua exercise.[stretch dc8 iirc], piece of cake....just a little jump and a quick slide, then up out of the way...

almost did another in early 70's.....club america, a travel org who chartered planes for member trips [went on a few], decided to buy their own plane, a 720.....they hired 2 pilots, 2 fa's [i think] and needed an evacuation drill for certification...a bunch of us volunteered to participate....when the 1st person jumped on one of the slides, it ripped, so,with the confusion, the inspector stopped at some pre ordained time and the plane was certified for only the number who got out....i was still on board....

the rest of the story,,,,the club was to put on another test after repairs....the pilots finished their training and quit...and things went downhill fast, with the club going under....