Poll: Kantian Theory!

Help!!  I'm working on a paper on Kantian theory.  (Mmmm.  LOVE that Philosophy...)  I need to come up with an example of how Kant "makes obligatory an action that we take to be obviously wrong."  I'm drawing a blank.  Complete blank.

Any ideas? 

My best thought so far was "everyone (in the US) should drive on the right side of the road."  *sigh*  And the reason it's "wrong" is that if there is someone - like a biker, walker, etc - in the road, we'd be obligated to plow 'em down, since we're morally obligated to drive on the right side of the road.  This sucks.

Philosophy major here.
Ethics, I suppose? I think this has something to do with how we do things that we know are wrong but continue to do it anyway.
Like, kill for food, when you're fighing you'll kill for your own survival.
That may be something along the lines of an obligatory action that is morally wrong. We should not kill animals but if we don't we won't survive. We shouldn't use automobiles because they kill the environment but we do so anyway to get from point A to point B.
It's been a while since I took ethics...2 years now. but i think that has something to do with it.
Lemme know if that helped :)
*S*

maybe try the soldier example that Christine Korsgaard uses. She takes a broadly kantian approach to ethics. She talks about the obligation to be a good soldier and follow orders versus being ordered to say, massacre a village. She claims, roughly, that we have different levels of obligation due to different parctical identities but here she really diverts from kant who just uses the Categorical Imperative so.. hope i was usefulish

You Kant always get what you want.

Sorry no I've really got going, Kant has no real thheory of motivation he is an externalist. At least he seems to be. This troubles me, see i think we have motivation but the motivation we have and the external reason we should act can be different. therefore I have reason to prepare for tutorials as it will aid me in getting a good mark in this module. However my motivation is that there is cute guy n the seminars an I want to impress him. Does that cheapen my act? Now Mill would say 'Yes', as I should act from duty. I would noew agree as I have found out he bites his nails so now I have lost my motivation to act. I still have a reason to act though....I like that I may try to work that into my essay on Humean Theory.

Emmanuel Kant was a real pissant who was very rarely stable...

Heidegger, Heidegger was a boozy beggar who could think you under the table...