I am writing a script for a film where a hot air balloon is punctured and it falls to the ground. There are two teenagers in the balloon when it is in the air. What I would like to know is how fast the balloon would fall the ground. Would it glide down or would it drop? This might be a dumb question but it would really help me out in the story. If it helps at all, the balloon is supposed to crash land on top of a canopy tree. Would the balloon go down like an airplane and crash landed, nosediving towards the earth at a fast speed or would the rest of the balloon slows its velocity down?
I need the characters to survive the crash and the tear will be about 4 inches. Would it need to be longer for the balloon to start descending for a crash landing?