There are numerous murtis (idols), sculptures and paintings
of Hanuman stamping on demons. One of the most famous painting and sculpture of
Hanuman standing on demon is that of him tramping on panvati (bad astrological influence). Others demons are
identified as Ravana, Kumbhakarna, Indrajit (Meghnad), Kalanemi and Mahiravana.
It is believed by most Hanuman devotees that Hanuman had on
one or more occasions defeated the above said demons.
Panvati, or Panoti, is a demon mentioned in Puranas and she
symbolically represents the all the bad astrological influences caused by the
Navagrahas or nine planets. The most popular image of Panoti is that of Hanuman
trampling on her. This means that Hanuman can remove all the bad astrological
influences.