Yeast are incredibly complicated living creatures. The best apart about brewing beer for me is you never really know what they'll throw at you. I bet your answers lies a little bit with what people said earlier about fusel alcohols, and a little bit of a perfect storm.
The chemical profile...
I have only brewed three batches, but I think I did something similar to you.
I bottled a belgian ale keg too early because my brother was in town and since he's never brewed beer I thought I'd show him the ins and outs... i cut it way too short. yes, i knew this was a bad idea when i did it...