I Can Fly is a SimpleFlips meme originating from the Super Mario 64 romhack Shrek 64, in which Mario is replaced by Donkey. Mario's "Yahoo!" sound effect used during long jumps is replaced with a sound byte of Donkey saying "I can fly!".
The joke became popular due to its frequency in the Shrek 64 stream. Additionally, as the same stream was still going, AutisticYui gave a song donation of 1, 2 Oatmeal with the lyrics replaced with I Can Fly, somehow managing to create and upload a remix in around 20 minutes.
Channel Jokes
1, 2 Oatmeal · 200 IQ · Abandoned Children · Adhesive · BUP · Eediot · Fred · Gay Baby Jail · I Can Fly · Ram Ranch · Roxanne · Shoutouts to SimpleFlips · No Cock Like Horse Cock
Stream Jokes
50-50 Grind · Banger · C O O L · Companion P · First Try, Idiot! · Great Entertainer He Is · SimpleFlips Screaming · Speedrunners Hate Him · T-Spin · Garbage
Cursed Bangers
Banger · 1, 2 Oatmeal · Ram Ranch · Roxanne · SimpleFlips Screaming · No Cock Like Horse Cock · I Can Fly
Community Jokes
0.5x A Presses · Aching Tentacles · Bomb Clip · Counter · Dad · Need it as my Ringing Tone · Owless · Press A To Be Gay Today · Pringles Can for $100 · Releasio 64 · TJ "Henry" Yoshi · Toss Your Salad · Unmod Ben · Robot 64
Narrators
Carlos · Harry · Narrator vs Text-to-Speech · SimpleFlips' Narrator
BLJ
BLJ · BLJ the Thwomp's Cock · God-BLJ · IRL BLJ
ROM Hacking Jokes
Green Demon · Invisible Walls · Lava · Lazy Texture Packs · Out of Bounds · Quicksand · Reverse Polygons · Teleportation· Chuckya· Horrifying BUP Abominations
Minus World
Nathaniel Bandy Everytime · Scuttlebug Bandy · Striving for Originality