When sleeping in a bed, any nearby particles will face towards the location of the player before they entered the bed. I expected the particles to turn to face the sleeping player, as with dropped items.
Tested in creative mode, with enderman (portal), mob death (explosion), burning, breeding, status effect, and torch flame particles. In the attached image I was flying above the bed prior to sleeping, and the torch flame continues to face upwards to my previous position.
Confirmed on Samsung Galaxy Note 3. Android 5.0