Keep in mind that VIX options expiry is next Wednesday, not tomorrow my friends!
According to Jamie Tyrrell, specialist for GroupOne, "Volatility in June is really high because we are the only near dated index product that captures the event (Greek vote Sunday). We've actually had a lot of bullish SPX paper (bearish VIX). Buyer of the June 20-21 Put Spread 15K times $.125 and a big seller of the June 22-28 Call Spread for $2.30 some 15,o00 times.
Here is a shot of the VIX movement over the past hour: