In case the size-altering mushrooms and cartoon-like environments didn't make it obvious enough, Super Mario Bros. takes place in a world of fantasy. However, it's always fun to consider what Nintendo's most famous franchise could have been like if the company had decided to adopt a more realistic approach.

In this segment from The Pete Holmes Show, Mario and Luigi find that hitting solid blocks with your head isn't the best idea in the world. The results aren't pretty.

[source kotaku.com]