Fire Retardant (Fire Rated) Plastic Sheeting holds up under a flame

The video about illustrates how a non-fire retardant piece of visqueen/plastic sheeing burns up with the advent of a flame. Almost immediately the non-fire retardant film burns away dropping flamining drips as it burns. The fire retardant film just self extinguishes while the non-fire retardant film makes what fire marshals deem a "very exciting fire".