Has anyone tried this in a dream? It's so awesome! Here's a tutorial:

1. Summon a brick wall
2. Run as fast as you can towards it
3. Smash into it
4. Repeat

If you have not tried this, then you're missing out. There are other variations you can try like driving a car into it, or flying into it, etc. You can also smash through the wall if you want.

Have fun