V for Vendetta has (IMO) the BEST EVER explosion sequence. Mainly because it's in perfect timing to Tchaikovsky's 1812 overture hehehe...
ok, here goes....
1. LotR: RotK 2. LotR: FotR 3. LotR: TTT 4. Fight Club 5. Snatch 6. Pulp Fiction 7. The Lion King 8. Forrest Gump 9. Love Actually (Because i'm a hopeless romantic) 10. Robin Hood, Men in Tights (Because "unlike some OTHER Robin Hoods, Ican speak in an English accent" and Mel Brooks is a GENIUS)
Princess Bride also rates, because of the awesome fenceing sequence. oh yeah. so many other ones I love, but there are too many to list, so I'll leave it at that.