Cat coming or going?

Sooo… this guy sitting in a bar asks the bartender for another drink. The bartender tells him…

"No way! You’ve had too many. Your drunk!"

So the guy tells the bartender…

"ohhh yea? I can pprove I’m not drunk! See that cat coming into the bar? He’s only got one eye!"

The bartender starts to laugh and says…

"Buddy… you’re drunker than I thought! That cat’s not coming…He’s going!"