Really hard way to work on a bus

Saw an amusing thing on the bus this morning; a girl working on her laptop, on her lap, with a mouse! A Full sized plugged in usb mouse. It was precariously balanced on the palm rest. She was using it quite a bit to. I don't know whether she hated the stick or whether she didn't know the keyboard shortcuts for the app she was using but this is a very hard way to work. I felt like shouting haven't you ever heard of a umpc or a tablet?