Round missiles
Sightseeing in Rajasthan picture - The 2nd wall snakes around the fort, & between this one & the 3rd or inner wall, the warrior Rajputs hurled boiling oil & water, & massive round missiles on their unwitting enemies below. (The fort was the focus of several battles between the area Bhattis, the Mughals of Delhi & the Rathores of Jodhpur.)