Why does everything fall apart all at once, seriously?

I don’t get how shit hits the fan at the same time like this time me and my brother had to go and take the car and I had this feeling that something will happen and later on we almost crashed. That same night when we got back home I found out my dog has got out of the house and somehow managed to get his big head stuck in the fence as I struggled to get him out of there.

It’s like everything is quite for a while then all of the sudden shit happens. But it's also true for the opposite that once good stuff starts happening to you it multiplies. Have you noticed this pattern?