Our most recent trip was with my parents. My mom was grumpy all evening and threw an actual toddler-like tantrum in the line for Slinky Dog. She was on an
ECV, screaming and running over our feet trying to get out of the line. It was so ridiculous that it was very funny after the fact. Almost a year later, my husband and kids still bring it up and joke about it.
In all our years of vacationing (kids are ages 13-21), I don't think they have ever really complained, thrown a fit, or fought with each other. Unfortunately, the same can definitely not be said about me.

I can't even count how many times I've been hangry or cried out of frustration.