If the corporation was eligible to be shorted, you could short it after you withdrew the market support, whether or not you are paying for that market support in terms of manipulating stockbrokers, promoters, etc. Yes, that's very much a possibility, and you can actually make a lot more money shorting it and covering your short or going long later. Cover the short, go long, and catch it on the double bounce.
On May 12th, 2010. See this statement in context.