I didn't test with all of the scenarios, but here's a few technical stuff I noticed:
Do not read if you don't want some slight spoilers.
By using Susie Soccer™, it is possible to softlock yourself by lodging her into the wall, or using her to push yourself out of bounds. You can still exit to menu to reset of course.
The bathtub and toilet have a rather blocky hitbox, allowing Susie to chill mid-air as the magician she is.
In Kate's scenario, the window still has collision after being broken.
When using the audio test, you can stand in front of the shelf before it flings. It will not collide with you. However, if you push the camera (after using it) into the shelf's line of fire, it will be launched. It will not respawn if launched out of bounds.
The shelf falling over animation is repeatable if you play the audio test again. Unlike the shelf, broken window animation does not repeat.
During the audio test, the light closest to the shelf will flicker regardless of whether the light switch is on. The light bulb itself will not flicker.
The initial position of the shelf still has collision even if the shelf has already fallen over. However, you can stand at the shelf's ending position if you reset the animation. This may result in a softlock, as you have now done the fusion dance with the shelf.
The head bobbing mechanic doesn't make the most sense when playing the car crash cutscene. You can still see the head bob when Sophia face plants into the ground, despite the cutscene is displayed from a spectator's(?) point of view.