Who said "Smile more than frown - even Hulk try."?

This quote is attributed to Hulk.

Smile more than frown - even Hulk try. - Hulk

"Smile more than frown - even Hulk try."

Hulk Humor

"Hulk is strongest one there is."

"Don't make me angry. You wouldn't like me when I'm angry."

"Puny god."

"Hulk smash!"

"Never underestimate the power of a good laugh."

"Laughter is the best medicine."

"A good laugh is the best medicine."

"Laughter is contagious and wonderful."