I was trying to make a way of fast player/mob transportation in PE.... and came up with this. Enjoy.
Step 1: Cow Powered
Build this capsule. This is where your "propellant" will go into.
Step 2: Loading.....Complete!
Build the loading pillar and add the sign. Keep hitting the sign with the cow spawn egg to add more propellant cows. The more the better!
Step 3: Finished!
To use it, Simply run into the group of cows to get fired away in a random direction! You can also add guiding rails in the direction you want to go. Just follow the photos. Also, it is better if you build this in a high place. FIRE THEM COWS!