Here's how to do it.

Step 1: Execute Hub Dupe, but before the Game Over screen finishes, go in Screenshot mode and wait for it to finish.

Step 2: Your cam should go up. If so, exit Screenshot mode and unpause.

You should be launched up like this:

That's Hub Dupe Launching! I hope you liked this tutorial and have fun speedrunning!

I don't know if this will be allowed since it does require Hub Duping. So yeah.