I never realized you could do this in SMW

[SuperSledgeBro]

I already knew that! It's funny when you find new things on a game you've played dozens of times.

I myself discovered by chance that you can "kill" Iggy's balls by sliding on them. (Though this is certainly an oversight, since their sprites become glitched when you do that)

There's another little thing which most people are still unaware of: did you know that the Big Boos will peek at you if you stare at them for a half minute? I almost jumped when I saw that. (video proof: https://www.youtube.com/watch?v=eXiIYVEA6UI)

Spoiler