Imagine not moving at all for a full 1.5 hr, in an enclosed tunnel, having to remember flash shots of landscapes and playing psycological card games.
Imagine the soreness of ur tailbone from lying at a position for too long.
Imagine hammering and banging sounds in ur ears while wearing ear plugs and head phones.
Imagine the few things you could do to wish time pass faster were to take deep breaths, listening to ur heart beat during those few moments of silence, and wiggle ur cold toes.
Add all of those together and that was wad i experienced in a fMRI machine today.