Toughest, Most Difficult Silent Meditation (Vipassana) Retreat Experience

I'd ran into a guy in India who told me about this Vipassana retreat he'd done. He told me it was super difficult but really great. You have to wake up at 4am everyday and meditate for 12 hours a day.  No phones, no reading, no talking, no writing, don't even look other students in the eye. Eager for real, transformative experiences, I signed up the first chance I got.…