I think a barking kid coming at you is more unnerving than an actual dog.
Madness string 82882
One of the most bittersweet feelings has to be when you realize how much you're going to miss a moment while you're still living it.
Time keeps ticking. Even if something seems like it will last forever, time will still make it seem like nothing. If it takes 10^65 years for something to die out... time will eventually get there and go on.