I'm a bit relieved to hear this: one of the weirdest professional experiences I have ever had was at an AWS interview. I've often wondered which parts of that day were a psych test or simply human error.

Timing of the interview was shortly before the HQ2 announcement (2017 I think), and the interview was in the outskirts of DC. I was told specifically not to bring a phone, which I thought was odd, but I didn't think I'd need one for the day since I'd be on site. So, per the instructions, I left it in the hotel, walked to the site, and checked in at the front desk. Unfortunately, they texted me 15 minutes before the start time that the schedule had shifted 2h later. The front desk did not get the message. So I sat in the lobby, repeatedly checked in every so often, had polite conversations with a random assortment of people, drank some coffee, and waited. That was the best part of the day. Each part of the remainder of the actual interview process had a similar "this seems a bit off" feature.