I get this sometimes when I turn over in bed, or sometimes when I get up from the sofa. It's generally on the right-hand side and it's an exploding pain that doesn't last long but is sodding excrutiating while it does last.
The location/feeling is basically what I imagine an exploding ovary would feel like! OK maybe it's less painful than that would be, but I have no idea how else to descibe it.
Has anyone else heard of/experienced this?