That incredible injury time winner against Stoke too (a 2-1 win with two late goals). The best bit of the Scolari "era". Then there are the countless goals in cup finals and other vital games.
The two goals against Bolton to win the league and his penalty in the 2008 CL semi-final (plus the final goal as well, but the match was less positive).
I'd rather twenty goals over a season rather than two in terms of returning the investment, but those goals would be priceless. Roman getting his hands on the Champions League after nine years would be well worth £50m.