When you fly into that funnel and know you need to do a U-turn at 500ft.
Use the autopilot if you have one, or keep a eye on your altimeter.
Don't worry about your wings falling off - most unlikely thing ever to happen to you.
But the water/ground will certainly kill you at 0 feet every time.
Last edited by ampk; 3rd Apr 2013 at 10:52.