(This will probably only make sense to people who live in apartment buildings)
When the mailman rings your buzzer, informing you that you have a package you need to sign for, so, over the intercom, you tell him "I'll be right down". No more than 3 seconds goes by and he rings your buzzer again, loudly saying, "HELLOOOOO, HELLOOOOO!!!" Then, over the intercom, once again, you tell him "I'm coming, I'll be right down".
As you're making your way down from your 3rd floor apartment, you hear him yelling "COME ON MAN, I don't have all day!!!"
Ok, first of all ASSHOLE, I live on the 3rd floor. I can't magically appear at the front door with a snap of my finger. Secondly, you KNOW that I live on the 3rd floor, so you should realize that it'll take me a few seconds to get downstairs. Fucking punk bitch mother fucker.