Try the colic waltz: Although it's much more fun to play with a happy baby, when it all goes «pear shaped», Dads are often the best baby settlers: you don't smell like breast milk so if baby has a bellyache, he can relax
without snuffling round for more mummy milk; you have big strong arms to lie him along (with his legs straddled across your arm and a bit of pressure against his belly).