The bottom two rows were clear, other than a vertical word my opponent had played that put an 'R' on the center triple-word square. My letters are a mess, but then I see a pattern. I start at the bottom-left corner and count out the squares. My word fits! I can play all seven of my letters, earning a 50-point bonus "bingo", and also hit a triple word score square. The letters are played one by one: 'H', 'O', 'W', 'I', 'T', 'Z', 'E', joining my opponents 'R'. "HOWITZER". 122 points. Not bad.
For the record, my best move ever was back in August, when I was able to bingo and also hit two triple-word squares on a play of "PARABOLA". That netted me 149 points.