There is a video demonstration at the link below showing just how hazardous a hot oil turkey fryer can be.
Most fryers do not have thermostats and can easily overheat causing the cooking oil to combust. Most fryers will tip over easily.
When lowering a frozen turkey into the fryer the difference in temperature can cause a boil over and the spilled hot oil will catch fire from the burner.
Putting too much oil in the fryer will cause a spill over when the turkey is lowered into the fryer.
Turkey fryers should always be used outdoors, away from buildings and never on wooden decks or patios.
Have a save Thanksgiving without a turkey fryer fire.
Link