ooh, now i have some amusing fake excuses...but the one that has come back to haunt me for years, is the time the trousers i intended to wear to work weren't dry in time, so i had to wear a pencil skirt instead.
unfortunately i had a 15 minute walk from the tube, and discovered that you really can't move too fast in a tight skirt, so when my boss phoned to ask where the hell i was, i explained i was late because i hadn't realised i couldn't walk as quickly as normal in a skirt...
i was ridiculed so much about this excuse, i quite honestly haven't worn a skirt since...oh and i eventually got fired from the job for poor timekeeping!