Thou shalt double-check which key thou intendest to play in. Verily, ensure that the guy leading hast not detuned his guitar a semitone, or the abomination will strike the ears of the multitude and they shall rise up against thee. Furthermore shalt thou know how high thou canst sing and where to place the capo thereto, otherwise the musicians shall play the introduction and then shalt thou find thyself cursed to squeak like a bat or croak like a frog.

Grab.