I figure, I hit my head on a chandelier after carelessly standing up and not looking about once every few months. It happens to a lot of us. So conservatively, say, 3 times a year at once every four months. Multiply 3 by how many years left you might expect to live. For me, I expect to hit my head 147 more times.

Crippled and Sweet

All of the above equals a joker
And all of the midlines equal a pointer
Pointing for a sore future
It's only bitter and crippled and sweet
But that's all it is