Nox Arca

Multi-level, dark, tight, hot, 10-meter-long tunnels with only one way in and one way out. There will be people crawling above you or below you. You can only move forward as fast as the person in front of you. You can’t turn around because the tunnel is only 60cm wide. You can’t back out because someone will be behind you. You just keep moving forward in the dark until you reach the end.