5. Mizuno Running poster.
This add is not necessarily clever, I just think it looks really cool. Its a nice optical illusion of running on two different terrains at the same time.

4. A.D.I.D.A.S. Cardiology, its what happens between runs
This falls more into the category of getting clever and funny. When you think about running more then you think about your job.

3. Nike Train your feet
I like this ad for the Nike Free for two reasons; its funny and I can actually solve the rubiks. Sadly enough, as of now I can just do it with my hands.

2. Nike no drive
Another nike ad that is another "drivers suck and we are going to do something to piss them off". 

1. A.D.I.D.A.S. Runners are different
I saw this with my initial WTF and then just laughed and realized how true this is. I'd like to meet the guy who proposed to make this into an ad.