I came across this meme on Twitter: #backflick - movie plots backwards.  Here are a few of my favorites (especially the first two):

Superman - A guy who flies around, putting people into precarious situations, then hiding.

Rambo - Sylvester Stallone healing people with his magical bullet vacuum.

Supersize Me - dude vomits hamburgers until he loses 20 kg and regains his health.

Star Wars - Contract presentation ceremony, then go to repair Death Star, return home to desert family.