Load up the "Survival!" mini-game under Gravestone. Now just wait until you see an enemy throw his head in your general direction. Now just run over to it, and make sure to kick it back at that same enemy. There is a little bit of trial and error involved here, but after a few attempts, there shouldn't be much of a problem. You can view the video for some more info.
You can also get it on the Mistpeak level of the Albion board, mid-way through the level when the snowmen throw their heads at you. AI gets in the way a little bit more using this method though, and takes a lot more time for extra opportunities.