The first time my youngest took a ride in one of this, it was hilarious (...and scary). He was about 8, I think, but tall enough to be allowed in. He got such an adrenalin rush that, after stepping out, he just kept jumping from one feet to the other with a gazed look in his face and going: "Oh, this was cool dad, ohhh, this was so cool...". It went on for about 10 straight minutes. I swear to God, I thought: "Oh, oh, I think I may have done permanent damage here...".
PK
I'll remember my first trip in one of those things forever. My friends (who were watching from safe distance...) said that my expression changed too - in a split second when that thing shot upwards :)