The Slow Mo Guys on YouTube are great! They even have a Facebook page. My son and I love to watch these videos late at night before going to bed. They use a Phantom Flex high speed digital camera that can record 1080p high-def at up to 2500 frames per seconds. If you have the cash you can buy one or rent one for the weekend at AbelCine.
My son and I just watched "Cinnamon Challenge" a few nights ago. Wow! We both laughed so hard we were crying! This has to be their best video ever:
Their video with a soccer ball straight to the head is one that first caught my attention. Here it is below, along with a few of our most favorite of all time.