  High-resolution observations of dynamic phenomena give insight into
properties and processes that govern the low solar atmosphere. We present the
analysis of jet-like phenomena emanating from a penumbral foot-point in active
region (AR) 12192 using imaging and spectral observations from the Interface
Region Imaging Spectrograph (IRIS) and the Atmospheric Imaging Assembly (AIA)
on board the Solar Dynamics Observatory. These jets are associated with
line-of-sight (LoS) Doppler speeds of $\pm$ 10-22 km s$^{-1}$ and bright fronts
which seem to move across the Plane-of-Sky (PoS) at speeds of 23-130 km
s$^{-1}$. Such speeds are considerably higher than the expected sound speed in
the chromosphere. The jets have signatures which are visible both in the cool
and hot channels of IRIS and AIA. Each jet lasts on average 15 minutes and
occur 5-7 times over a period of 2 hours. Possible mechanisms to explain this
phenomenon are suggested, the most likely of which involve p-mode or Alfv\' en
wave shock trains impinging on the transition region (TR) and corona as a
result of steepening photospheric wavefronts or gravity waves.
