(the) next thing (one) knows

(redirected from next thing you knew)
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(the) next thing (one) knows

All of a sudden; out of nowhere; without warning. I was standing in line, minding my own business, when the next thing I know, a gunman runs into the bank and starts screaming at us to get on the ground! Tammy had only been on a few dates with Mark, but this one had been going smoothly. Next thing she knew, he got on one knee and proposed to her.
See also: know, next, thing

the ˈnext thing (I knew)...

(informal) used when somebody tells a story and wants to say that something happened suddenly or unexpectedly: I was just walking down the road and the next thing I knew someone was pointing a gun at my face.
See also: next
References in periodicals archive ?
Next thing you knew, the Rockets had gone 11 possessions with only one basket, and the Lakers had built an eight-point lead.
The next thing you knew, Parker was adoring the woman's jacket made by an unknown New York designer.
The next thing you knew, it's back on even terms again.