It's crazy how fast it goes bad. Last week I had to go to the ER and the first thing they did was take like 4 to 5 vials of blood to run a "rainbow" test. After the doctor came in he told them what tests to run and they only used 1 or 2 vials and when I left 2 hours later you could see the blood they didn't use still sitting in the little tray all coagulated and shit.