I don't think FB gaps more than 8%. A gap down would not be massively bullish short term (but depends on the location). The only place I would really feel comfortable with a short would be an open at or below $100. Very bullish if FB gaps up to $188 or higher.
ONE COULD consider 118/119 100/99 Iron Condor expiring this week for .25
IF fB makes it down to $88 ish, I would look to buy for another long term set up. If you're in shares, a $120 May covered call could be fun! A lot of prem right there...