What blows my mind absolutely out of the water is the concept of time being bent, or non-linear.
How can someone standing in one place experience the equivalent of 24 hours, and someone else standing somewhere else not experience 24 hours in the “same” timeframe.
Because it's relative. Both people experience the same 24 hours, just differently.
Astronauts in the ISS go through time faster than we do on earth due to gravity. GPS satellites proved that quite long time ago, they have correction factors built in for the difference that gravity on earth creates.