A/C doesn't follow you outside.

Simple fix: don't go outside. :D

My second invention idea when I was a lad was for a jacket that was a self contained climate control device. This was after my I created sketches for my first invention, a levitating car commute system. My friend took both to his father, who at the time was an executive at a Korean auto manufacturer. Still waiting to see those 2 materialize.

You might find this surprising, but it's kind of nice to actually be able to go "outside".