truth in advertising

I have a friend who admits that sometimes he gets so irritated with some commercials that he finds himself talking back to them.  I'm not quite that bad but I must admit that there is one commercial running these days that bemuses me.  I think they're being honest and I have nothing against lawyers.  Some of them have helped me a lot in the past.  But this line from a personal injury attorney makes me wonder. The add says "Our fee will never exceed your net recovery."  Really? If you win a case for me I won't owe you more than everything, presumably after expenses? Thankfully I don't need to sue anyone right now but if I was thinking about it I think this would take away much of my motivation.