One time I went to pick my younger brother up from his friends house I had called him an hour earlier and told him I was on my way so when I got there I just gave him a miss call and waited outside. I was scrolling through my phone in the car waiting for my brother to come out. When all of a sudden the passenger door opens and my brother screams HELP MY FRIENDS DAD IS HAVING A HEART-ATTACK. I quickly get out and run with my brother inside his friends house. There i saw his dad on the couch sweaty, peeing uncontrollably and shaking. The way his dad looked scared me. Since i never had anything like this happen before i didn't know how to handle the situation so I called 911 and told my brother and his friend to go to the kitchen and wait there so they didn't see any more of this. I then tried to help him until the ambulance came. Thankfully they showed up quickly and took him to the hospital. He survived it and is doing much better now. This might not be scary but I never saw a man that close to death before and it scared the shit out of me.

(Sorry for any mistakes English isn't my first language)