INTERLOPER: Tuesday Manifest - Day of Defeat: Source demo oddities

I bought Day of Defeat just for this video...

Correction and notes:
* Demo 21 seems to be a recreation of Eida's screenshot from the "interloper investigation part 3", when he was thinking that the Umbrella Man was showing up in other games. Interesting.
Thanks for MatthewPherigo for pointing this out.
* Actually there is something notable about data89, after looking bit closer
There's a Dev comment for a G E, talking about why it keeps trying to build mazes. And how the ball at the end isn't the best prize. Also inside the map's description it says "FSKY_SVR_GEN"
* As more then one user pointed out, the odd sound effect could also be for interaction rather then teleporting.
* Upon further viewing of demo 104, maybe it's less aimless wandering and more so that it hit a wall? So maybe it did hit another map, it's just we can't see it.
Thanks for TheBillinator3000 for pointing this out
* There's two odd demos that I didn't include in the video. These two demos only oddities was that the skybox was flashing different colours. Nothing too odd, but just going to leave a note here about it.

Link to the full demo of data104:
   • INTERLOPER -  Day of Defeat - demo 104  

Music used in order of appearance:
Planet from Half-life: Opposing Force
Vague voices from Half-life
Fright from Half-life: Opposing Force
Limbocore Main from Limbocore