You are walking in the down the road, just thinking about whatevs.
Suddenly, a BRILLIANT idea for a video pops up in your head! You MUST not forget that idea!
You check your pockets/purse/backpack/whatever for your a pen and a sheet of paper. Nothing's there
You look for your phone (so you can write it down digitally) in your pockets/purse/backpack/whatever. The battery died/You left it at your grandma's.
What do you do to not forget the Divine Inspiration that has just been given you by the almighty God/Universe/Zeus/whatever floats your boat man... ?