I had one of my assistants once explain that she was late because someone tied a dog to her car.Well that's not something any of my pupils have ever given as a reason.
The funniest one was 'Mum's new boyfriend had a sleepover and she forgot to set the alarm'.
Nothing is secret with kids about.
The next week she was late because her eggs were too hot and she had to wait for them to cool down before she made her sandwiches.