Boruc has always been capable of doing stupid shit like that. When he was at Celtic he did it quite often. For example, in a Scottish Cup match at home to Dundee Celtic went behind when Boruc came off his line to make a routine clearance but only managed an air-kick and Colin McMenamin (I have no idea if I spelt that right) just had to run around him and tap it into the empty net. After the match Gordon Strachan said some thing like "Before every match I try to think of anything that might happen so that we can be prepared for it, but I didn't see that one coming".