Who said "Oh my God, they found me. I don't know how, but they found me."?

This quote is attributed to Marty McFly.

Oh my God, they found me. I don't know how, but they found m... - Marty McFly

"Oh my God, they found me. I don't know how, but they found me."

Marty McFly Fear

"This is heavy."

"There's that word again, 'heavy.' Is there something wrong with the Earth's gravitational pull?"

"I'm your density. I mean, your destiny."

"You're my best friend, and I care about you, but don't ask me to do this."

"Face your fears with courage."

"You can't live your life in fear."

"Snakes. Why'd it have to be snakes?"

"Fear is just another obstacle to overcome."