Wow, I haven't remembered stuff like that in years...
My Father used to have us "train up" latching on to belt loops, belts, etc,... and not letting go...Disney World, Dolphins Football Games, concerts, etc,...My younger sister would whine, and I would have to grab her by the arm, face, whatever, (we were kids),
once I put a bruise on her wrist, as she was 6 or 7, and let go of my belt, and I spun and grabbed the first thing I saw, which was her lanky little arm. She survived, and we kept the "train" goin,....
We were having a hard time sticking together in the crowd,
wife didn't want to lead with me on her backside, and she had a hard time keeping contact when following. That is until I had her just take a firm grip of my belt, and I drug her through.
Time and a place for everything,...

not the Metro Dome, of course,...
It worked than, glad to see it still does.