What's the title of the movie about a woman who stuck between worlds?

I think this is a comedy movie, but I am not sure. An adult son (age 30) with his mother went to the circus or something like that. Mum - fat black woman 50 years old, was there the presentation of the illusions, the woman stuck in a closet, for sorcery, and she was lost, stuck somewhere between the worlds or something . Then her head in the form of a hologram was hunging in the air above the city, she talked, saw everything and all that ...