Rollercoaster

My natural instinct is to blog about "how life is a rollercoaster" or something silly like that (purely because the photo would compliment content like that), but that kinda content probably doesn't justify the photo much...

Instead I'd say that I've been experiencing a kind of rollercoaster effect in my working days. Work will be going well and my productivity would be right up there and then - at random - the drive to finish something or to move onto the next to do just vanishes completely in a very "bleh" moment.

Anybody else experience that kinda, sudden drop in motivation / productivity?