Slats is right on to something:

Blowups (blowouts) come from a few sources (experience chiming in here):

Trying to do too much - taking a shot that is way more risk than reward.

This is usually caused by - thinking you have a round going, and trying to save a hole from a bad position, OR having a bad hole, and trying to 'make up for it now'.

Having had a fantastic round last time out - now you expect to do it - and the pressure is on!

I'm getting quite the lesson on focus. Too many times we are not focused on the right things - be it in life in general or on the course. For course related issues, how many times have you found yourself thinking about your score, the upcoming hole, the last shot you took, what's available to eat at the turn, where the beer cart is, has your partner noticed your new clubs yet, your neck sure is itchy, I hope the boss isn't mad that I'm here, did I forget to pick up the laundry, I've really gotta pee and I shouldn't have had that whole bottle of water all at once....

Too much. Largely unfocused. It's true what they say - if you focus on sending the ball to the target, and GET OUT OF YOUR OWN WAY, you're pretty successful. But it's tough to focus, and maintain that focus. But bad things happen when you forget what you're supposed to do, and lose focus.

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True Length Technology Fitter - www.truelengthtechnology.com
It's live! - www.ShipShapeClubs.com
PCS Class 'A' Clubfitter

A new highlight: Golfing the home course on Christmas Day.

I say it too often: If it's golf club shaped, you can play with it.

For the record, I'm a club doctor, not a swing doctor.