Asbestos can absolutely kill you painfully after a single exposure and regularly does. Do not assume that you will probably be fine if you are not exposed for long. It can and will kill you. Asbestos kills more people in the UK every year than cars do. More than 5,000 people A YEAR die in the UK from breathing in asbestos dust at some point in the past. It's not like filling your pocket with sand, where a little bit isn't noticeable, it's more like putting a lit firework in your pocket. 1 lit firework is better than 10, but 1 will still absolutely fuck your day up.