  We study quantum chaos in two dimensional conformal field theories, building
on the work analyzing the out-of-time order thermal correlation functions using
large-c Virasoro blocks. Our work investigates the contribution of light
intermediate channels and smearing length scales to the four-point function and
scrambling. Precise relations for how light intermediate channels increase the
scrambling time and how smearing length scales smaller than the thermal length
scale decrease the scrambling time are derived.
