I recall an instance back in my hard-core EQ days where I landed a sweet group tanking with my dwarf paladin. I believe it was in my race for level 60, and I don't recall the zone I just remember it was great experience (Possibly PoD courtyard) and it was one of those groups where everything was just clicking. Pulls were coming in timed perfectly, mobs were dropping like flies, everyone was having a good time, etc.
At one point during this marathon exp group, I realized I had to dump. It's happened to most of us I'm sure, you know it's there, it's in the back of your mind, but you push it off thinking "just a few more pulls, then I'll call a break". Mostly because you're afraid as soon as everyone stops for a breath, someone will look at the clock and realize they need to get off, you lose a key player and spend the next hour and a half trying to get a replacement.
Anyways, there I am. Tanking like a mad fiend, occasionally feeling that pressure in the lower instestine, knowing I'm going to have to break but still not wanting too. Soon, it becomes like labor pains. The time between cramps becomes more frequent, the cramps themselves become more severe. Eventually, you have to hold your breath and stop all movement till it passes. (Keep in mind that I'm about 10 feet from the bathroom door). Finally I a am ready to concede that I can, in fact, no longer hold off the inevitable. Then my room-mate (who is on another computer playing a different game) gets up and beats me to the Room of Relief.
"Dammit, foiled again! Well, just one more pull..." I think to myself. About that time another cramp hits, and it's a doozy. It's all I can do not to soil myself right there. I hold my breath, anxiously awaiting it to pass--
I wake up on the floor with my room-mate standing over me looking bewildered. "What the hell happened to you?" he asks.
I mumble something incoherantly, and rush to the restroom to finally unload my rather pressing package. When I come out, I find my group had managed not to get killed somehow, and I mistakenly confess to my room-mate what had caused me to pass out.
He laughed for an hour, and has never let me live that one down.
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Some people are like slinkies, they aren't really good for anything, but they still bring a smile to your face when you push them down the stairs.