I built a big tower of POW Blocks to the height of the whole screen with the help of the SMB2 stopwatch. Then, I dropped 1 POW Block on the ground, and then it gave me a Runtime Error 9: Subscript out of Range error. Interestingly, it is because SMBX is trying to make most of the POW Blocks bounce when the screen shakes - but it's too much, and thus it may start giving a runtime error.
Here are illustrations I made:
After all of the above, crash.
See? Try it at your own risk.