Great information, but unlikely scenario. (Wasanelder Once)
I had the same feeling. It sure seemed smooth, very smooth...
- the OP remembering exactly where to turn in the KIngdom Interlinear Translation (p 23).
- remembering the name of the Catholic monk who devised the pronunciation of 'Jehovah' and the year he did it (Raymundus Martinti in 1270)
- knowing instantly which scriptures to turn to (Eph 4:4, Luke 1:19, Rev 7:15)
- having the presence of mind to work Bob Dylan and The Beatles into an illustration.
Most of us would have to have pre-studied carefully or used detailed notes to present this. Oh well, maybe the OP has a photographic memory that is called into action when there is an unexpected knock on the door.
It actually reminded me of some of the experiences presented by Watchtower in the publications, which are often just to much to take literally, even though they are much less detailed than this.