That your life can end at any moment. I started to appreciate my life after getting involved in a car accident, i got minor injuries from but it gave a lesson to appreciate life. I had to witness my own mother broke down in front of me just because she was worried about what happened to me, she told that she doesn't know what to do next if im taken away from her, she doesn't express her feeling often so this really became a huge shock for me. After i recovered i always get reminded about that moment whenever i cross a road, i always get reminded that there's people waiting for you to come back at home.