I once pretended to be a mate's dad at his parents evening.... I told his French teacher that his grades didn't matter cos he wouldn't ever be going to France anyway... and i told his maths teacher that his grades didn't matter because maths was just rubbish... and i told his english teacher that my mate wouldn't be attending his lessons because I thought it was pointless.... then his history teacher recognised me as one of his ex-students and rumbled me... luckily everyone found it quite funny....