Hello again.
I Usually forget something when i go walking, although i usually manage.
There was one time i went without a lighter, or matches and couldn't light my stove all weekend, and i gave up trying to start a fire after over an hour, since it was drizzling and everywhere was wet. It was awful not being able to have a cup of tea! And I had to have my boil in the bag pasta meal cold.
Now i tripple check i have my lighter, and i keep some matches in my first aid kit now, since i never forget that.