This might be a homage to FMA extra page scene where the Father nullifies alchemy but the SFX is the fart noise.
Only the sound effect was switched, but the trauma is... Doubled! It becomes doubled! fart One day, the RiftIt was Super Effective!Now, Nunu!It's hard to use Nunu ult with some impact. Don't worry, I'll teach you something nice.Look, you're leaking.