Yeah, the first part is kind of easy, just leave an inch of "fluid" in the can and shoot it 1/2 inch from the bottom, will go as high as 15 feetBugs wrote: Shooting nirvana when you attain that level. An example would be hitting a can just right so that it flies up into the air and then hitting it again while it is still in motion in the air.
Second part, hitting it at the apex, I can't practice