Newer / New SMBW Glitch - Clip through underwater downward sloped tiles

Pretty sure this is retail because I doubt there'd be anything special about Newer's tilesets that would make this happen besides placement. Haven't tested in retail. And then I spent an hour trying to reproduce consistently. And I did. : -- www.twitch.tv/mariomasters1/c/3771744&utm_campaign=archive_export&utm_source=mariomasters1&utm_medium=youtube