A. Rashi , Yevomos 80b , says warm air like smoke.
Q. What was the unique stature of Rebbi Nosson ?
  A. He was a great Tana a chaver of R. Meir & he was the Av Beis Din who would always delve into the depths of an issue. 
  
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  Q. What is the basic rule if someone fell down & broke someones item by mistake or due to an accident ?
 A. He is responsible to pay for all of the damages as if he were a Meizid. Rambam , chovel umazik 6:1. 
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Now may be a good time for a gem of Torah study.
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