  We analyse the aperiodic flaring features, also known as shots, observed in
Cyg X-1 in the 0.1-80 keV energy band using a 6.39 ks simultaneous observation
with AstroSat and NICER. We detect 49 simultaneous shots in the soft and hard
X-ray bands with NICER and AstroSat-LAXPC, respectively. We observe the shot
profile for the first time in soft X-rays (0.1-3 keV), which shows a spectral
peak at $\sim$2 keV. Using time-averaged spectroscopy, we measured the
truncation of the inner accretion disk at $6.7\pm0.2$ gravitational radii. The
shot-phase resolved spectroscopy allowed us to identify the origin of some of
the brightest aperiodic peaks in the soft X-rays. We find that the accretion
rate is consistent with a constant during the shots while the inner edge of the
accretion disk moves inwards/outwards as these shots rise/decay. We discuss the
possible mechanisms causing the swing in the inner radius.

High Energy Astrophysical Phenomena