A Snake Called Monty

Monty saw some young boys playing with matches and lighting a fire in the bush, even though they knew they shouldn't be doing it!
When the fire got worse, and one of the boys, Andy, fell in its path as he tried to escape it, Monty had to quickly take his family to the safety of the river nearby as the boy's father ran to help his frightened son.
What happened to Andy?
What lesson did he and the other boys learn?