The two groups were separated by an 'imaginary' line down the middle of the room.
an 'imaginary' world of dragons and unicorns
a child's 'imaginary' friend
(..) Yeah, yeah. I guess that true. - What are you doing out here? - Well. There's not much call for imaginary friends lately. So, I. You know... Yeah, yeah, Don't be sad. Tell you what. (..)2015 Inside Out
(..) No, you don't. I get that a lot. - I look like a lot of people. - No no no... I do. Bing Bong, Riley's imaginary friend. - You really do know me? - Of course. Riley loved playings with you. You two were best friends. Oh, oh. (..)2015 Inside Out