This is the little guitar part you hear on Fallout 3 and New Vegas whenever The 
Mysterious Stranger appears in V.A.T.S., or when you use the Mysterious Magnum.

E-----------------]
B-----------------]
G-----------------]
D-----------0-----]
A---------2---1---]
E-0-3---0---------]

E----]
B-7--]
G-8--]
D-9--]
A-10-]
E----]