"I didn't come all this way just to NOT try out my toys!"

Explanation: By some accounts, the largest and most powerful trebuchet ever made, Warwolf, was never actually used in an active siege situation. Edward I, according to these recollections, had it bombard Stirling Castle after it had surrendered, simply because he hadn’t spent a fortune (and three months of time) having it built, transported, and reassembled to the siege location just to not use it!