Like the reddit post said, airplane fire retardant.

Well that's retardant ....

so did the fire get put out?

I figured it was the result of a drunk guy trying out his brand new Sherwin-Williams Hi-Pressure Instant Paint gun.

.

Yeah, I bet the homeowner is really "p#ssed" that their house and cars were saved from the fire.

The red colour comes from the ingredient iron-oxide, and it can be the devil to wash out. However I reckon that it's a small price to pay if it saved them from being barbecued.