come up for air—(U.S. sl.) take a break; have a rest:
- George decides to revisit the place in order to “come up for air” and remember what the good life used to be.
go up in the air—(coll.) become angry; lose one’s temper:
- He is so irritable these days that he goes up in the air for no reason at all.
Note: The expression does not correlate in meaning with the phrase vanish into thin air—disappear completely from sight or existence:
- Speed, confidence, shooting ability, all seemed to have vanished into thin air.