I didn’t want to throw a wet towel on it

This is a mash up of “I don’t want to be a wet blanket” (a downer or a party pooper) and “throw in the towel” (resign or give up).  In context, the speaker wanted to stop the activity (walking) but didn’t want to ruin the fun for others so kept walking.   The malaphor cleverly combines the two thoughts. (heard at the Australia Zoo – Beerwah, Queensland).