It's like when you read something hilarious and respond with lol in chat, but you don't actually laugh or even smirk, or like reading an exciting book without ducking and weaving - over time you just increasingly get more efficient at separating mind from body for different types of activities/inputs.
It does vary by person/activity though - I can ride a rollercoaster with a unmoving body and blank face and be having the time of my life, but cannot watch cringe-worthy things on TV without physically seizing up. Others are the other way around.