I haven't got a fucking clue. It was just an option I'd never tried before. I think it is along the 3 from 4 lines. If I'd bet £4 in total I could've won £17ish but I only went for £2 in total, 4 x 50p, so max win is about £8. Canny shit, but I'm just experimenting.
Quick edit.. if anyone more savvy can shed some light..
You say canny shit, but I don't usually splash much out so it'd be something I'd be interested in probably.
I meant canny shit looking at some of the money people have spent in this thread and the amounts they hope to win. I'm all about the small stakes.