Dangerous Ice fishing goes wrong, pressure ridge opens up. 

What was supposed to be a full day targeting perch along some cliffs turned into several hours spent dealing with a few pressure ridges that trapped me an another angler out on the ice. While the ice may be plenty think around you, in our case we had 4 inches, it can be dangerously thin around pressure ridges. Always be safe and take proper measures to ensure you can get yourself out if you happen to go in!