Police say a Muncie grandmother was lucky to be alive after her 11-year-old grandson and 12-year-old foster son allegedly jammed her bedroom door shut and set the house on fire. The pair hatched the plot Tuesday after they were sent to bed early for misbehaving. The boys taped the door shut with duct tape and used cooking oil to start the fire, police said. Fortunately, the blaze did not get out of control before the woman woke up, smelled smoke and escaped. The boys are in a juvenile detention center and face arson charges.