Mario was outside the castle where, he hoped, Bowser was holding Princess Peach. "The coast is clear, Luigi," he said, so the brothers went in, Luigi singing, in the voice and looks of Enrico Caruso:
"La donna è mobile
Qual piuma al vento,
muta d'accento
e di pensiero.
Sempre un amabile,
leggiadro viso,
in pianto o in riso,
è menzognero.
La donna è mobil
Qual piuma al vento,
muta d'accento
e di pensier'!"
"Luigi!" said Mario softly enough to avoid being heard by Bowser's minions but loud enough for Luigi to hear him. "Eat a Snickers®."
"Why, Mario?" asked the tenor-plumber.
"You get a little dramatic when you're hungry," Mario answered, so Luigi took a bite. "Feeling better?"
"Absolutely," Luigi answered, and so the two plumbers fought their way through the castle, fighting a Chargin' Chuck where Bowser should have been.
You're not you when you're hungry.
Snickers® Satisfies.