What's the difference between Michael Jackson and a grocery bag?

One is white, made of plastic and is dangerous to small children.
The other has handles.

2 men and a woman were talking about the fact that stepping on a duck will bring bad luck. One day in the park, the 3 people met. The woman was with Michael Jackson. The 2 men asked what happened and she said "I stepped on a duck,". The 2nd person was with Britney Spheres. The 2 other people asked what happened and he said "I stepped on a duck,". The last guy was with Pamela Anderson. The 2 other people asked what happened and Pamela Anderson said "I stepped on a duck,".