When Metallica recorded "Enter Sandman," we're pretty sure they weren't planning to play a toy instrument version of the song on national TV 25 years later. The heavy metal legends did just that last night on The Tonight Show With Jimmy Fallon — and it certainly looks like James Hetfield and Co. had fun with it. 

Hetfield sang the iconic lines, Kirk Hammett joined in on melodica and Lars Ulrich kept the beat with an incredibly small toy drum and cymbals. We can't say that it sounds great, but it is a cute spectacle to watch. 

See it for yourself below. Metallica release their 10th record Hardwired… to Self-Destruct tomorrow (November 18). 

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