The U and N could have ripped off the front of R's face turning him into an F. Kind of an OMG that's horrible but still funny because R did say, "let's have some F-U-N.
I was thinking anything that deviated from them spelling RUN would be funny. They're so cheery and wholesome that spelling URN and giving that morbid twist makes this hilarious.
This could have went a few different ways. This is the way I hoped for.
I thought it would spell run
The key to humor is subverting one's expectations.
The U and N could have ripped off the front of R's face turning him into an F. Kind of an OMG that's horrible but still funny because R did say, "let's have some F-U-N.
I was thinking anything that deviated from them spelling RUN would be funny. They're so cheery and wholesome that spelling URN and giving that morbid twist makes this hilarious.