Sorry. I just don't like topics like this where they 'reveal' well-known information. Kind of just... irks me. I like clicking on something like this hoping for a not very well known secret, not something as... admittedly, very hard to miss like this.
---Why is there a hippie on a flying carpet in the desert in my Zelda game?!---
I'd rather see the topic's message continue like this:
I found this out screwing around with the napsack ability, but essentally, if you open up the onion directly after the collision of captain & onion, the captain can be seen behind the onion managment panel, floating slowly to the ground (while everything else is paused as it should be) in anything but the manner you'd expect after colliding due to magnetism.
In simpler words, he floats to the ground like a feather.