How it happened
At the left side, a SMB3 wooden platform was placed. It was attached to the SMW platform line(no platform rope end thingy that blocks its way off the rope used). It was surrounded by blocks. I played as Mario, got on the platform, and then... it somehow glitched fast from the left side from the right. Kinda fun, isn't it? Well, I was the first one who discovered it. Please credit me for this glitch. Thanks.

Sincerly,
DaSpongeBobMan