SMG4 is a long-running Australian YouTube channel founded by Luke Lerdwichagul that parodies Nintendo's Mario characters in chaotic machinima comedy, and Mario's Tunnel Of Doom is one of its adventure-style episodes. The Wii 'Woo' cheer is a nod to Nintendo's Wii Sports crowd sounds, which became a meme sound in their own right online. SMG4 fans clipped this version straight from the episode and it now circulates on soundboards as a compact celebration sting, especially popular with viewers who grew up watching both the Wii era and the SMG4 series.