Probably "overwhelming" pain. Where you almost complete loss of rationality, a torrent of sensation that blocks out all other thought and sensation - vision narrows to a point, sound becomes choppy and discordant, limbs feel far away or even absent (no, I don't mean the one that's potentially chopped off or something ;) , the other ones)
Oh, it wasn't anywhere near that threshold! (Although it was well over that for swearing the air blue.) See my sibling comment to yours; I just meant that the nature of the sensation was almost identical to that produced by a shot to the area, just in my head instead of my belly - and, yes, that really does feel as weird as it sounds like it would.
