The Touch

If you’re a nerd like me, tell me if something similar has ever happened to you:
My wife was just having problems connecting to the internet on her Apple Powerbook. I asked her if I could see the laptop. She gave it to me. I quit out of Firefox, restarted Firefox and got onto fine.
“I did exactly what you did but it didn’t work. I don’t get it – why is it when you do something on my computer it works?”