What addition rules are you playing with? Also is the player with tumble wearing clothes. Is also depends on the rank of magic missile. If you have a maximum rank magic missile you are able to lock on to a target and use a special charge ability that turns it into a magic nuclear missile. You can't dodge the nuclear radioactive area damage. You have to be super high rank to achieve this.
Magic missile, known the world over as the holy grail of all that is magic and missile, is an ancient magical/tactical/strategetic weapon used commonly in the past by wizards, sorcerers, prostitutes, politicians (ie. George Bush), popes and other terrorists and any variation of mage therein. It is often labelled as a weapon of mass destruction, but its possession is sanctioned by the UN.
