Okay, so this video was probably about 20 seconds to long and rather silly. But there are lessons to be learned here. Do not try this! When I first saw this video I laughed. However, I believe that this could become a dangerous situation. There are many companies out there who specialize in this service and utilize special machinary to complete the job SAFELY!
Until then, check out this video on how to clean the glass on a moving walkway/sidewalk.