It is very difficult for retail investors to short penny stocks.  While it can be done, it is risky, and requires a substantial amount of cash.  As far as I know, one would need an account in Singapore, Germany, or I think Canada to short penny stocks.

If shorting is going on with MDRM, and they have to cover, that is an ideal time to make lots of money riding the coat tails of the shorts.  The share price often goes far higher than the real value of the company, and yes, a dollar or more would be possible.  However, I never count on this happening.