First goal scorers and which shop you do it in

There's is a bookies over here which offers a great twist to this bet, if you do a first goalscorer and he scores the first they will double or treble the odds if he scores another one or two and it does not matter in what order the goals are scored, ie. Torres scores the first then the fourth and say the seventh, your starting price of say 4/1 then goes 8/1 then 16/1 if he scores three.

Anybody who does this bet in Belfast should use this small chain of bookies.
Anywere out side Belfast do this.