I was casually playing Mario on RetroArch on my mac. I had just started a new game and was playing through 1-1. I was on the second pipe of the level. i walked off of the pipe and jumped as soon as i hit the ground, and was going to hit it one block (as in 16x16 pixels) short of the top, but then i landed inside the pipe as if the top block didn't exist. I didn't get a screen capture because i didnt realise that i clipped through until after i jumped off. Could this be a new speedrunning technique to save a few milliseconds? or is it just a waste of time. Anyone else?

If I understand you correctly (Mario walked through the pipe), then I'm pretty sure you'd lose time since (iirc) you'd have to press left in order to clip into the pipe.

@SammmyilSpider

1. You can actually clip into or through most block "seams" in the game under the correct circumstances, including pipes.

2. Friendly heads up - you may or may not be intending to run this game and submit times, but RetroArch is not an allowed emulator, so if you do submit a time, you can't use that emulator :)

I too had a similar situation

https://m.youtube.com/watch?v=07POiOae540