new member with a question

Hi, although I am a new member I think I have every thread in this forum at least once. Many thanks to all of you for the great tips and knowledge of FSX. It has made my flight simming much more enjoyable. My Question, yesterday i was flying in the default Baron. I was flying along at 5000' following the mississippi river from Minnesota to the gulf. Flying with real world weather, cruising at about 145 ias I started to go through some pretty heavy turbulance. My ias was making severe dips and climbs. All of a sudden it shot to max speed and I crashed due to aircraft stress. I keep realism set to max. Is this possible or was this just a freak glitch in FSX. Is there any way to prepare for something like this other than trying to fly above or below the turbulance as quick as possible? Could something like this happen in real world? OK, I guess i had more than one question 
Again many thanks to all for making this forum a joy to read.
My desktop, one of my first FSX pictures,

Again many thanks to all for making this forum a joy to read.
My desktop, one of my first FSX pictures,