caught the holy ghost

Catching/ having caught the holy ghost/ spirit is a euphemism usually said by African American Baptists for then one gets so wrapped up in church service they begin to dance and sing as if you were possessed by the holy ghost, as seen in the example below

Child: " mama, what's Ms. Florida doing over there?"
Ms. Florida: *dancing but with soul*
Mother: "well it loos like she done caught the holy ghost! Go, Ms. Florida! Praise the lord!