This is cool. http://www.fearofphysics.com/cgi-bin/fall.cgi?building=empire&height=100&trail=yes&mode=wrap

                 For other cool stuff go www.fearofphysics.com

                 Needless to say jumping on a moving bus is a stupid thing to do. To jump off a building hoping that a moving bus will break your fall  http://www.answers.com/topic/break-one-s-fall is also not very smart.