Perms and hair color. You can color hair that has been permed, but try to use a semi-permanent or 'no-ammonia' color instead of a normal permanent color (which uses ammonia and 20 volume peroxide). Have your hair permed first.
Mowing grass works best when the grass is dry, as grass tends to bend over from the weight of the rain, making it difficult to get a straight cut. It also clumps inside your mower cavity and on your lawn, which can lead to dead grass underneath the clumps if not raked promptly.
If you have a habit of leaving your lawnmower outside in all kinds of weather, sooner or later you'll probably be mowing your lawn when the mower quits and won't get started again. You won't have a dead mower, but what you probably will have is a bad case of water in some part of the lawnmower. Water in the gas or motor oil will prevent your mower from running and has to be completely removed before you try to start the motor again. Take proper care when dealing with these flammable fluids to save your lawnmower without endangering your landscaping or the local wildlife.