Use 2 x 4's and drive them into the ground. Then put pants and shoes over them. You can drill holes into the shoes to get them to fit over the stakes (don't use boots with a steel shank). Jam the pumpkins over the 2 x 4 and position a stuffed shirt. Cool.
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My co-workers and I run the biggest store for bachelorette party items in the world. It is lots of fun. We have fun jobs.