Trance as I am sure you understand is anathema to Zen teachers. The notion of someone on a cushion entering into a state where they might be suggestible, vulnerable to someone like Bela Lugosi in a kimono and fright wig is bound to be repudiated in any zendo.
Crossing the Line
When I first started to sit, I couldn’t sit cross-legged in any posture for more than about 5 minutes.