Creative Max Effort Day

Does anybody have any creative max effort methods? Methods of heavy max effort lifting that break the usually max set of 1-5 reps routien. One particularly nasty variation that I use is squatting a 3-5 RM for as many times as possible in one minute. Obviously this is only possible when the one minute giant set is broken into sets of 1,2, and 3 repetitions. This is repeated up to 3 times.

The bar is racked during the rest periods within the giant set. The most I have gotten in the minute time frame is 7 reps with a 250 lb Zercher squat. Any other interesting variations out there?