Never had them wheel in a whiteboard but I did have an interview right after graduating where the recruiter lied about my experience level. The conversation part had been painful, with the interviewers quickly realising I was not right for the role. For some reason I was wearing a full suit because I thought you were supposed to for interviews (typically you do not do this in dev/IT lol).

Just when I thought they were going to let me go someone brought in a laptop and connected it to an overhead projector. Then asked me to refactor and fix bugs in some sample C# code; I only knew Java. It was excruciating and I'll never use a recruiter again. Approaching 8 years in the industry working at 3 different companies and never needed a recruiter for any of those roles.