Conan O'Brien Injured in "Tonight Show" Stunt

I wonder what the backup plans are. If it is just one day, they could just show a rerun. But, in case of Conan or Leno I wonder who they have in reserve to fill in, in case of emergency. Imagine NBC 10PM gap if Leno was in a car accident and out for 6 weeks.
 
Conan is too tall and gangly to be performing any stunts. They showed a repeat of Conan on the Tonight Show yesterday, but I am sure he will be back to work on Monday. I am not sure about O'Brien, but Leno is on contract to deliver 48-weeks of "live" performances over his 52-week contract. No backup plans that I know of...
 

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