I have many tales involving the shift in the abdomen from contented peace to 'holy fuck I need to evacuate these bowels right about now' most notable being at Kallo power station in Antwerp and the only available, unlocked toilet resembling the one out of trainspotting with shit after shit on top of eachother, which I added to without any sense of relief.
Others, non scatalogically related:
Tweek and I mooching in a derp (or not derp) mill in Marsden about 10 years ago. We tripped an alarm by opening an electric roller shutter from inside and the angriest man in Yorkshire (Hi Pete) stalked the building for ages searching for us whilst we stood upstairs half hidden in a cupboard with our knees trembling. He called the old bill but I managed to placate him by offering him seggies of my SPLORESNAKK (a satsuma)
Carreau Wendel Coal Washery: One of the plate steel (rusty AF) walkway panels that bridged gaps between machinery and more solid surfaces flipped like a trap door when I walked across it opening a 4 storey chasm to certain painful death below. I managed to grab an equally rusty balustrade that bent under the stress of being asked to support a surprising weight, and by sheer luck, positioning and gravitational momentum I was able to swing myself back around to relative safety. Quite distressing at the time I recall.
West Bromwich Spring Works Those who visited here may recall that access was made by climbing the leading edge of a semi demolished wall that had handily created a toothed brick ladder up to roof level. Some devious soul had doused the edges of the protruding bricks with machine grease. Ascending was fine but throughout the entire explore I was anxiously trying to clock an easier way out to avoid the slippery bricks. To no avail, on descending the greasy bricks my left hand slipped off from what felt like 15-20feet up and was very close to tumbling backward, that was unpleasant.
Walking into security (literally) at Bergwerk West and being shown the door swiftly, in German
Spending 40 mins digging a hole under a fence at ArcelorMittall Hayange with a metal dildo and a shoe before being jumped on by S3CC4 and les Gendarmes "For you, urbex in France, is over"
I'm sure there's more but these are the ones that come to mind with my poor power of mental recall from the last 15 years.