Getting The Hang Of The Coffee Machine

I must admit to you one of my stupid moments - last Friday I worked for Sarah at the Cafe, she showed me how to make a coffee which I watched carefully to learn, her husband comes in and she asks me to make a coffee for him, so I pour the coffee in a mug - not a measure in a expresso cup like she showed me, and then said stupidly to Sarahs husband called Neil
"Why doesn't it stop!"
and he points out that I have to push the button again to stop it - which I was shown - I felt really stuuuuuupid.
I have learnt now and will do better!!