Tobacco Factory, BristolMark Bruce's latest work is sensationally stimulating but perilously dizzying and hard to stomach Mark Bruce is a fascinating, highly distinctive choreographer, his work frequently spiralling around themes of darkness, myth, fantasy and the unconscious. His recent pieces " Macbeth, The Odyssey, Dracula " folded these fixations into well-known narratives, but Return to Heaven harks back to a mo…