"Charge moves such as blade kicks are simply executed as instructions, so they cannot fail. Guile can do a bladekick from a standing position simply because that’s what’s in the script."
I sort of neat trick is during a dump you can be holding down to charge your "blade kick"* and immediately when you hit the ground, press up and kick to execute the move, and it gives the appearance of one of performing the move without charging. Sometimes gets a surprised look by your opponent.
That's a pretty big cheat, to be honest.