Video caption contest hints:
1) Download one of these
images to your computer.
2) Add a caption to the still via photoshop, MS paint, or whatever your favorite image editing software may be.
3) Toss it up on some site like imgur
4) Right click it - get image location.
5) Click the little picture icon in the replies:
6) Paste image URL.
7) Post reply.
Or you could post the image you like, and just type the caption in the replies ... if that's more your style.