It was a calm day, and yea, it was just to see how quick it went up and down, and see how tall it was compared to his car. it only stayed up for 5 min then right back down again.
I was thinking just some sand bags, but that would be a pain to drag around and get sand all over your car transporting them. the water would be nice idea, since usally if your washing your car, theres water around, and its easy clean up, so you dont have to drag it around with you. I was also thinking just like a brick or somthing, but then you would probally be stubbing your toes on that all the time. Bucket idea so far is the best I have heard.