I hate flat spare tires!
My son has a blow out so I run up the street to help him. Pull out his spare thats never been used and its flat! We put it on the car and it has a little air in it so I make a dumb choice and say lets see if we can make it to the gas station. 3 feet later the tire breaks its seal from the rim. Dang it! Hey google, will my wifes car spare tire fit my sons car? Yes it will! So we drive across town and grab my wifes spare. Put it on the car and lower the jack. Its also flat! Dang it! Take the tire off, go to the gas station, put air in it, take it back to the car and put it on. Finally he can drive the thing home.
Learn from me everybody, go check your spares air pressure!