Summer officially started Wednesday, so here's a great video to kick things off: Someone built a homemade waterslide in their backyard...and it has a LOOP.

In the YouTube video, one person does the loop while another person goes down a SECOND waterslide that ramps him THROUGH the loop.

How awesome is that?!?! By the way, unless you're some kind of brilliant carpenter, DON'T try to build one of these for your family. That's just asking for trouble.

Also, if you liked this, check out our supercut of 'Slip 'n Slide Fails'!