This is the type of short-term trade structure I put on after a VIX pop, if the VIX rises gradually I'll move up my short strike to turn it into a calendar. If the VIX makes a huge pop (which is the worst case for this trade) then I'd close the short leg and let the long leg ride for a bit know that history is on my side (for the last 3 years or so) for a drop. That being said, I do not have one of these trades on currently - with the VIX at a fairly extreme low I'm a little uncomfortable with a 2-week trade looking for VIX to remain the same or dropping further. However, if you are looking at a longer trend trade with your long leg expiration being farther out then selling a short-term ATM put would make sense.