1. Film crew or actors - by burning themselves or something or by spilling wax and burning themselves
2. The person filming may slip over
3. Person holding paper on the fire
4. People could walk into each other and something eg table

What Are We Already Doing About It?

1. Filming in an uncluttered space (Less likely to knock over) and being aware of the flame at all times 
2. Trying to avoid the really muddy area's as much as possible and wearing wellie boots
3. To film it, we held the paper on fire over a fire place and held the paper with metal tongs and gloves to avoid the flames flaring on the persons hand
4. Trying to stay in one place when filming and being aware of where everything/everyone is