Now you tell me...
WAY back in the day, when I lived in a house heated with the product that Citizens Gas and Coke supplied in Indianapolis, I made a few balloons from very thin plastic drop cloths - 9*12 feet in size.
Fold them over, tape edges, and you get a bag 9*6.
Fill them with stove gas and you get a bag with very little lifting power, about a book of matches, a stub of a cigarette, or a few sparklers.
Due to low gas pressure and permeability of the plastic it takes 20-30 minutes to fill. (Ya do this OUTSIDE!)
At night you get one of two effects.
The balloon slowly lifts outta yer yard and disappears into the night sky.
A few minutes later, after the cigarette burns down to the matches, you get a SPECKTACULAR!!! fireball in the sky!
Alternatively you leave a trailing of sparks into the sky with a fireball ensuing when the sparks meet the plastic.
During fire bans, bleepin’ tourists here love sending up Chinese flying lanterns with lighted candles.
Now you tell me...