The character is at the main hall of the mansion, he's floating over those leaves at the entrance.

To do this you have to throw a smoke grenade and jump over it.
When it explodes, quickly move the left stick to random sides and start pressing A over and over again.
If you do this with good timing, the locust will start flying all over the place and if you are lucky, you'll end up here. Though most of the times you will die when falling down to the ground. lol

I'd like to make a video tutorial, but it's hard to play with one hand and record with the other.
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https://www.youtube.com/watch?v=EWtYV0Qvteo