Trying to think of a few from this season:
Every single one of Somen Tchoyi's goals!
Dorrans' cross/shot against West Ham.
Scharner against Sunderland, if you've seen him take a shot with his feet before you'll realise this was a fluke.
Mulumbu against Villa! Either immense skill or immense luck, but got a blessing with the finish anyway.
And also Tamas' superb header when we played Blackburn. Immense finish. Looked almost like he meant it.