Agreed, but formatting must be done properly or it doesn't work. I've read a lot of stories by new authors who sandwich a different character's actions in the middle of the speaker's words. VERY confusing. Dialogue with or without tags should either be in a paragraph by itself or with the action of the speaker.
"It's a bird!" Louise said
"It's a plane!"
"My heels are killing me." Lex Luther pointed at the sky.
"It's Superman!" Jimmy said.
Lousy example, I know, but you get the picture. Either Lex is a cross dresser or he's not the one talking.
Tina