Clock doesn't stop when it goes out for a throw, it's still technically in play. If you start dicking around and take 30 seconds to do anything (of course the opposition can't do anything, not like they can knock it out of your hands), the ref will book you and add that 30 seconds on (or he should).
Here's one though. Goal kick. You're allowed to have defenders in the box now but I think an attacker still can't enter the area until a second player has touched it after the keeper. So you have a geezer standing two yards inside the box, and the keeper rolls a pass that stops short of him, and he doesn't bother trying to play it. The ball's just sitting there, it's in play, the keeper hasn't wasted time, he's played the ball...
I suppose "ungentlemanly conduct" or whatever they call it now is a cover all for this kind of stuff.