There's so much content on the internet that sometimes it's easy to forget about the classics; only recently were we reminded about this absolutely hilarious cover of Slipknot's 'Duality' using clips of cats, dogs and goats making sadistic noises and pitched to hit the song's notes.

You might recognise some of the furry guys in there from plenty of other great covers which have surfaced over the years! Check out the mashup below, although we warn you that once you've heard it, it's hard to listen to the original track without this entering your head!

Listen to Slipknot now.

RELATED:

Watch Dog Metal Band The Bubbas Perform 'Who Poo Poo'd In My House?'

Watch This Guy Play Korn Songs Using Corn

Watch Metallica's 'One' Played on One String