잉글리쉬쇼핑

next thing (one) knows

• 
  의미:
  (예고없이) 갑자기, 느닷없이
  
  예시:
  Next thing he knows, sirens are screaming, he's covered in blood.
  The next thing he knows, she is suddenly charged with some sort of expenses fiddle.
  The next thing he knew, there was a cloth over his mouth and he passed out.