Horrendous RIP peeps.
Deepest sympathy to relatives and friends. Horrendous accident, I have only thought of peeps falling out of basket, guess fire is a greater risk. Treatment of materials to render them inflammable would be a good thing to consider.
My son made a model hot air balloon which was launched by Prof. Heinz Wolf in the science museum South Kensington - burst into flames halfway to the ceiling OMG!
Life can be so precarious, RIP.