I can't put my finger on which show this was referencing from... I might be mistaken but this was probably one of Monty Python skits.

https://www.youtube.com/watch?v=cOZH57odl_k, actually this is not from Monty Python but from an old cowboy movie called They Call Me Trinity (1970)

"Ehi Oguri. Dicono che sei un fulmine con la pistola"
"Ah. Dicono così?"