Idiom Definition 1:
  
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"to hit the roof" - things
  
  a statistic or number that rises very quickly to an unpredicted incredibly high value
   
Synonyms: 
  ballistic, bark, berserk, blow, composure, crack, erupt, flare, flash, freak, fume, haywire, lash, nuts, rail, rant, retort, scream, snarl, snap, storm, temper, vent, yell
   
   
 
 
 
Idiom Definition 2:
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"to hit the roof" - people
    to become very angry
