Possible Clues:

• It has a mathematical focus
• Flight of a bowl before a knock up?
• It looks like something may be thrown in this section
• A conic section
• Firecracker's path
• Curve like path of object thrown in the air
• What's represented by x2 = 4py
• A high shot, one hit on the turn, might describe this
• (Mathematical) curve
• Curve such as y = x squared