Quite possible. But I think blaspheming the Holy Spirit is very specific as outlined here,

http://www3.telus.net/trbrooks/unpardonablesin.htm

In other words, the only way a person can truly blaspheme the Holy Spirit so that they can never be saved is if they did so in the presence of when Jesus was on earth.

If you think of it this way you appreciate how gracious God to save even a Benny Hinn though of course, we all know the probability of Hinn getting saved is like winning the lottery.