Something I feel sad about in this multi-channel age is that the young don't get exposed to the likes of them in the way I did when growing up. The sheer genius of them is going to be forgotten. A friend of mine who is about 30 had never heard of Harold Lloyd, never seen him. I showed him on YouTube the clock tower sequence, and pointed out the brilliance of the camera work and the risks taken (albeit it wasn't as dangerous as it looked!) and he was stunned. He had no idea.
Those two were just brilliant. But I fear destined to be largely forgotten.