The Indian Rhino, especially a cow with a calf in tow, can be very dangerous indeed.
Male Nilgai in non hunting areas often turn on and have have been known to kill farmers trying to chase them off their crops.
Wounded wild boar, can quite easily take a limb off with one bite.
A Gaur bull in Musth, will make an unprovoked charge/attack with some pretty crushing consequences !
M.