“There was great joy
In that city
ἐγένετο δὲ πολλὴ χαρὰ ἐν τῇ πόλει ἐκείνῃ.
The author of Acts indicated that there was great joy (ἐγένετο δὲ πολλὴ χαρὰ) in that city (ἐν τῇ πόλει ἐκείνῃ) of Samaria. Obviously, the people in this city were very happy that Philip had come and cured so many people of their problems. Would you be happy if someone came to cure the people in your town?