I thought this was posted already but I cannot find it so here goes....
First video : at first it seems like a prime example of some very irresponsible flying.
Second video : after some stick on other Forums the pilot has explained how it was carefully planned and coordinated and has released a behind the scenes video which is actually better than the first.
Have a look at both then read the explanation under the second.
Ice slide (http://www.youtube.com/watch?v=wlCg56K08hE#ws)
http://www.youtube.com/watch?v=zjA24fQcscg#t=11 (http://www.youtube.com/watch?v=zjA24fQcscg#t=11)
Boys and there toys!