you don't have to have large diaphragm switchable patterns to make that mistake!
i did it with my oktavas...
i've got a sample somewhere around here i'll try to post, sounds pretty fucked up!
edit: found it!
one channel was omni, the other was hyper if i remember correctly, and the channels were swapped!
i was going to run split omnis, but one cap was fucked up when i did a signal test...i switched it out and moved to hypers xy config, but i forgot to change the other cap or switch cables as i was rushing. luckily i didn't care too much about that set and then realized the mistake afterwards so the rest of the day turned out fine.