So some friends invited us to come with them to an interactive haunted house/solve a mystery experience called "House of Spirits". Drink cocktails and interact with costumed performers to gather clues. It turns out to be a heavily commercialized thing (apparently they run this in multiple cities) that is pitched to move through pretty large mobs each session, so obviously there is no place for subtlety -- everything is turned up to 11.
So after we wander through the David Cronenberg memorial basement set interacting with the various wet-puppet performers & collecting body parts, we turn them in for our next clue which is "Find the Red Death and ask them to show you Truth". Out on the patio, we find a performer seated at a table in a cowl and red death's head mask, so we plead for truth.
The performer holds up a mirror with a QR code engraved on it... :laughing:
(P.S. it's really dang hard to scan a QR code on a reflective surface)