What Am I?

Any guesses? Look close. Hint: this is usually bright red, and all of you have seen it before.   This is kind of fun! I wasn't very happy with any of the shots I took today, but I like this game of guess so much, it actually makes me feel better about the photo. Give up?

It is a row of carts at Target. I took it from inside the store on the floor. Looking outside so the light made all the shadows.
Now, can you all imagine what the employees and shoppers were thinking?