Reading mind power anyone?

A while ago some friends of mine (well, actually my boyfriend and his friend) asked me to produce an illustration for their website so I did this. I think they kind of liked it but I guess they were thinking of something completely different and in the end they told me to do something else, more simple and graphic.
I think after this I definitely learned to ask questions before start a drawing for someone else. I can't read people's mind as well as I thought I could.
This was a useful lesson.