The context of the following conversation is Lee couldn't find their skateboard. When they arrived at the skate park, they found that their sister Quinn had taken it.:
Lee says I wanted to go skating yesterday but couldn't find my board..
The friend responds Oh no, you lost it?.
Lee responds Well, I went to the skate park and my stupid sister Quinn had it..
The friend responds She took it without even asking?.
Lee responds Yeah, I was so mad.  I need to put a lock on my bedroom door..
The friend responds Not a bad idea, man..