"Blessings and Bombs" is an orchestral piece on the Season 5 soundtrack.
In a flashback, Jacob blesses Sun and Jin at their wedding. Back on the island, Hurley, Miles, Jack, Jin and Sayid are in the Dharma van. They stop when they see Sawyer, Kate and Juliet blocking their way.
The title refers to Jacob's blessing Sun and Jin's marriage and to the bomb Jack's group transport.