Celeste audio glitch (intentionally left in game)

In the Celeste Race at SGDQ 2018 Kevin Regamey from PowerUpAudio mentioned this audio bug which they intentionally left in the game.
• Celeste Race by TGH v ... (29 minutes in)

[@radiancedelta5194]

Madeline, you’re drunk. Go home

[@QuinnyBean]

This is beautiful

[@muhammadrifqiabdillah9788]

Why'd this in my recommendation?

[@BGDMusic]

that's funny

[@faudelgrey5047]

I’m sorry 23hrs?!??