Back To The Future 2 - Futuristic Cranes
When Marty is being chased in 2015, he hovers out onto the pond. When Griff's gang chase him down, they go flipping into the building. Look closely as they approach the glass. You can clearly see the rigging and aerial cables swinging the gang into the glass. If you are able to slow motion, you can see about 2 frames of the guys when they bounce back.... MAJOR FAIL!!
on 08-02-2010 and