why do things run out?

I don't know exactly what you are asking.

Balloons leak.

I'd like to know why coffee runs out in the morning when I want another cup.

Dog works in mysterious ways, doesn't she?

I'd like to know why people are always running out for a bite to eat.

If they're in such a rush, why don't they just order in?

It would be really shitty to run out of toilet paper. That's why I always make sure to have an extra 12 pack hidden away, just in case.

I ran out of sugar, once. Actually, the sugar ran out of the bowl.

I was trying to think of something witty to post, but I ran out of ideas. I'd think about it more, but I have an appointment shortly and time is running out.