You, Chris, Matt and Nick went to the mall just for shopping. You knew that Chris tends to get lost at all times and everywhere, so you always held his hand so that he wouldn't get lost.

Chris can just go to a random store and then not understand how he got there.

If he is alone at the airport, he may even accidentally board another flight and fly there to Hawaii.

That's why you kept holding his hand, and Chris didn't mind, he loved holding your hand.