After an accident I was given ketanest in the ambulance. Not sure if the trips are at all similar but I found it really fucking strange. The engine sounds amplified into a sort of weighted blanket of noise, then every sensory input became mixed up and turned into sort of moving bricks I both heard and saw, that went on for what felt like eternity with the bricks stacking ever higher on my senses.

Then we arrived at the hospital and they had my mega fucked leg returned to its normal position and fixed into an inflatable splint thing while I had felt nothing. Was an interesting experience.