I work in the Safety Department at CU and have an office next to a very cool CU police officer - he said he'd go get the details for me. All he knew for sure at this point is that it was assumed the guy was rapelling (my friend will try to find out what sort of set up/gear was in use), the top of the crane swung when the guy jumped/rapelled and the he was smashed into the building across the street (it's barely a 2 two story builing and he is said to have hit around the SW corner). When CUPD arrived he was hanging about 5 feet off the ground from the rope.
There were 109 mph gusts in Boulder that night and the police are wondering if that is a factor, at this point it is assumed that the movement of the crane was the biggest factor.
Anyway, thats the news from CUPD and the Safety Department...
-Carrie