Youtuber PsychoSpeedGame has been kind enough to record a tutorial showing anybody how to pull off the Backwards Long Jump glitch.
2017, David Snyder, Speedrunning: Interviews with the Quickest Gamers, McFarland (→ISBN)
A backwards long jump (BLJ) is a glitched jump which gives Mario enough speed to rocket through otherwise locked doors. LBLJ is a backwards long jump performed in the castle lobby which allows Mario to pass through a locked door to the ...