So I played a bit this morning, and as the slots were terrible I went min bet on doa2 - usually I do low bets, but around €0.5. Well as nothing paid I went ultra low to just do some spins on the last bit of balance left and hit this one. Have had many bonus on doa2 before, but never even a retrigger - this one I got my first retrigger on the slot, and the retrigger made a full wild line with double 2x on it.
So despite the low bet, still a good €373 win raw.