So this happened. We were playing a quintet concert in a library the other day, and I didn't quite like the way my oboe was aligned. Some of the keys on the lower joint affect vents and pads on the upper joint, and the instrument wasn't responding quite right, and I knew exactly the microscopic adjustment I needed to make in the way those two joints had twisted together. This happens frequently, and I was ready to fix it and move on. So I twisted the joints. I over-corrected a little. Tried to go back - and the oboe was stuck. Untwistable. I tried wiggling it, twisting the other way, clockwise, counterclockwise - nothing. And what had been a slightly inconvenient little technical glitch was suddenly an unplayable oboe, and my colleague was just about to finish his speech and introduce the next piece. But I already know that the oboe is not my friend , and I nearly always carry a spare instrument, and I was able to pull it out, slap the reed on, and be ready t...