Yep, couple weeks ago in the Thousand Islands (Tony said he wouldn't tell, so I will). I was just returning from a long weekend of dry suit diving in Tobermory, switching to my wet suit as the temps are so much better. The wife has a new wet suit. We both suit up (always a long process, and no fun in the heat, and a fairly choppy day). Within moments of each other, we realize we BOTH have out wet suits on backward. My DS is a front zip, and my WS is a back zip. The wife's new suit is a back zip, and her old one was a front. The other guy on the boat just sat there very quietly...... OOPS!