What's a unique thing that happened to you?

When I was little, my siblings and I would suck in Helium to change our voices.
One time, I was alone cleaning my room and I loved to hoard balloons so, I had a bunch.
I start cutting them open and sucking in the helium but, my voice didn't sound like it was changing to me so I kept taking more until I passed out.
When I passed out, I slammed my head against a metal chair in my room and all I remember was my vision going black and hearing trains passing by in my head then, I woke up gracefully slumped against the chair like I had rested my head to take a nap on it.
I was so confused.