Even worse are those times laziness or lack of resources kicks in. Last night I was trying to shoot a B&W image in colour, but simply didn't have the resources. Turns out the store was sold out of white face paint, so I was left converting to B&W since having the side of my face in colour simply didn't work. They're getting white in later this week, so I'm going to redo this shot and fix the blemishes and errors with this version. Also need a different brush to paint the remaining hair I have left.
I guess context matters for the above. I belong to a number of websites that have thematic challenges. The challenge was to shoot in B&W, but I wanted to shoot a colour photo, but only have B&W elements within the photo so you wouldn't be able to tell the difference.