[robertpaulsen]

Hell, some well-placed bowling balls dropped from 60 feet should do the trick. Or deck chairs. Or pipe wrenches.

[Indy Pendance]

How about the garbage and waste?

[caryatid]

Thanks, but I am not going to lean over the rail to "aim" my bowling ball when someone is shooting at me.

[ppaul]

Thanks, but I am not going to lean over the rail to "aim" my bowling ball when someone is shooting at me.

Of course not!
Use one of these cool bowling ball mortars:

http://www.docsmachine.com/nonPB/mortar.html

http://www.fireiron.net/fireweb502_009.htm