Most opportunities for unusual results occur when there are options which collect significant first choice votes, but few second preferences, as in the political example I give above. (politics.stackexchange.com)
Since all the estimates cited were seasonally adjusted, it would be possible to get unusual results if a mistake were made in the adjustment process. (canadianbusiness.com)
It has a tendency to throw up unusual results as well, which is always a good thing. (wtf1.com)