From the eBay Listing
When wound, the tiger turns his head slowly from side to side as if sniffing out or stalking something, he crouches down (his rear legs go forward under his body and his front legs stretch out in front of him), and then he leaps into the air and moves forward about six inches! This is amazing to see, and it'll startle you every time he does it! In the center of the tiger's tummy is the brass on/off pin. The pin should be pushed in before winding, and then pulled out once the tiger has been placed on a hard surface. He works best on carpet since he has short metal pins that protrude from the bottom of his rear paws that give him the traction to leap forward.
The eBay listing for this jumping the tiger automaton offers more details as well as 12 photographs from every angle.