| A skateboarding trick. Noteably an incredibly difficult skateboarding trick, hence the name impossible. Still, it is overshadowed in difficulty, technicality and style by its younger brother, the Front-Foot Impossible.
This trick requires a lot of speed and a lot of height, so do not attempt this until you can ollie high, handle speed, and are good.
First off, get your speed, and ollie when ready, your feet in their regular positions. There are several versions of the elusive impossible, so I will list the three most common methods:
1. With your back foot shove down hard, but only when you have enough height for the board to do a full flip, longways. If you don't have enough height you will land flat on your face, which isn't nice on concrete. Anyhow, by shoving down on the board this sends it into the longways flip. Once it comes back around catch it before it can keep flipping, or once again you'll be flat on your face. This is the easiest method.
2. This time use your front foot (this is still different from a front foot impossible) and shove down on the board once again, but spin it into a heelflip or a kickflip this time (usually easier to get more power by pushing down and out to start a heelflip rather than down and in). As before, you need alot of height, more actually. Once it comes back around catch it, but this time you also have to wait for it to finish its heelflip\s, so be careful.
3. Using your front foot once again, and shoving down once again, but this time getting the board into a pop shove it, usually a 360 shove it, though 180 shove its are a possibility. Once again you have two factors to watch for, the longways flip and the shove it, so watch your landing. This is the hardest method. An ever harder variation of this method is to do a 180 or 360 flip, this requires a ton of height, and you must shove down, heelflip\kickflip and shove it all at the same time.
The landing, at first, is impossible. | 
