I was at breakfast with my sister and we were having a funny conversation, while i was taking a drink of coffee she made me spit my coffee up, and laugh. When that happened, I choked on some coffee and i couldn't breathe. I don't remember what happened next, but i remember waking up, it was hard to talk and still very hard to breathe. My sister told me I blacked out for like 5 seconds, my face was pitch red and my eyes rolled to the back of my head. She said she said my name about 4 times before i woke back up. I didn't hear anything.