Who said "Death has taught me that life is infinitely precious."?

This quote is attributed to Dr. Emmett Brown.

Death has taught me that life is infinitely precious. - Dr. Emmett Brown

"Death has taught me that life is infinitely precious."

Dr. Emmett Brown Death

"Great Scott!"

"This is heavy."

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

"If my calculations are correct, when this baby hits 88 miles per hour, you're gonna see some serious shit."

"Death doesn't scare me anymore."

"Death and I are old friends."

"Welcome to my world."

"Death is just the beginning."