In High School back in the 70' s I would make "UFO's" out of dry cleaner bags , paper straws , birthday candles , pins , and skotch tape . They would float over the neighborhood , eventually going out of sight , My friends and I would follow them on our bikes as far as we could .
One particular night , our crude hot air balloon was going pretty good - then it started to sprinkle a little rain . The "ufo'' began to loose altitude from the weight of the water droplets . It landed in a neighbors tree on their front lawn . The plastic bag soon ignited . It was Fall , so there were no leaves on the tree . The burning plastic began dripping Fire Drops on to the lawn below that was covered with fairly dry leaves , causing another small fire . We were hiding in the bushes laughing . All the lights in the house went out , and we could see curtains moving and faces peeking . Finally , some one came out and hooked up a garden hose , sprayed it , while scratching their head wondering how their tree branch and lawn caught fire while it was raining .
I realize now that I am older , this could have been a disaster .
They really look cool though , floating around up in the sky !