This is the first battle where the ERB logo is not on a color gradient background. It instead appears on a dusty, brown background.
The way Eastwood shoots three bullets at the last mustached cowboy by using his left hand to pull the back trigger repeatedly is a reference to the way Eastwood playing the Man With No Name would shoot multiple foes swiftly in the Dollars Trilogy of films.
The outro is referencing the common tropes used in Westerns, where it often has the whistle and a tumbleweed rolling across the screen.
At any point where a lower-case f immediately precedes a lower-case i, a black bar can be seen in between the two letters.
When Clint Eastwood shoots a cowboy during his Pu-Pu platter line, part of his gun is missing.
Epic Rap Battles of History - Behind the Scenes - Bruce Lee vs Clint Eastwood-0
KARAOKE ♫ Bruce Lee vs Clint Eastwood. Epic Rap Battles of History. INSTRUMENTAL
TRANSLATED Bruce Lee vs Clint Eastwood. Epic Rap Battles of History. CC
BruceLee VS Clint Eastwood epic drawing of history!