The Metallica co-founder James Hetfield wrote the power ballad lyrics to "Mama Said" on the back of a paper napkin.
"Mama Said" is a power ballad by American heavy metal band Metallica from their sixth album "Load", with music and lyrics by James Hetfield (music credited to Hetfield/Ulrich). 
 Hetfield co-founded Metallica in October 1981 after answering a classified advertisement by drummer Lars Ulrich in the Los Angeles newspaper "The Recycler". 
