Since sizzler has his answer, I'll hijack this thread.
About 35 years ago when I was in highschool three of us had a hair brained scheme to try and freak out our little midwestern town. We decided to build a UFO and launch it over the town on a Saturday night. So we went about building a balloon shaped wire frame about six feet tall that we then covered with a lightweight paper. We then wired a string of christmas lights to it & rigged up a battery pack that we also attached to our UFO.
Now, how to get it aloft. (Guess we didn't think too far ahead.

) Eventually we came up with the idea of using hot exhaust pipe air to send our extra terrestrial creation skyward, so we went to a service station that my brother was working at and borrowed their exhaust hose.
The wind was from the east that night so we went about a mile out of town and setup the rig - two of us holding the balloon up and the third making sure that the exhaust hose was doing it's thing correctly. Anyway, that '62 slant six Valiant just couldn't muster up enough hot air to get the balloon aloft, although we tried and tried. Even set the rev's way up hoping to get the engine really hot and thusly sending the UFO skyward.
Nope. No UFO over Rooten-Tooten-Newton that night.
However, at the time we had a police scanner in the Valiant and we did do something else with the balloon that did liven up the air waves for a while that night, so all was not lost.
Still a great story to retell at our class reunions.
