trick pics

i want to try this one also 

i want to try this one

For the first photo im going to have someone laying on the pavement on like a curb that looks like its that actually flat ground and then higher up have someone else standing on the real ground and then take photo laying down on the ground like 10 feet away.
For the second photo im going to get a can of whatever and hold it in my hand and wait to find a cloud that looks like it would be spraying from the can and then take a photo.




http://thechive.com/2008/11/17/a-collection-of-trick-composition-photography-35-photos/#