There's some videos floating around youtube of such mishaps, some not completely horrendous. I like the one of the young guy who racks a clean so enthusiastically he manages to jam it against his throat and pass out.
I've only paid attention to powerlifting for 7 or 8 years, but I remember when 1,000lbs was a big squat, massive really. Never used to be particularly anti supportive gear, but I do find it telling that we have 21 year olds squatting a grand and yet only Andy Bolton is deadlifting over a grand. Difference is that no-one has made a deadlift suit that gives you several hundred pounds worth of support.
No particular slam on the guys involved, they do what they have to in order to be competitive, and I've certainly never had a grand on my back (about half and that was for a walkout) It seems to be an equipment race now though, well squat and bench are.