Thank you for your question. Oh, treadmill is indeed from the real world :)
How about this? Typically, a student goes to a teacher to a school/college or some sort of a building to learn something. However, NPTEL has reversed this for us. We, the professor, came to your home/office to teach you (through the tube :))
We need to go to the restaurant to eat. Food delivery services bring the restaurant to your place.
Originally, there were stairs, where the person moved, the stairs were stationary. In an escalator, the person remained stationary, the stairs move.
Thanks and have a great day!