Agree it's a serious matter, however, were you able to do the demo ad lib for your son during distraction like good experineced travelers should

.
I have been on a few flights where most of the front cabin breaks into the routine doing the hand motion in conjunction with the FA's. Sure it's a serious message, however, it shows that if someone can do it in unison, there just might be some cognative redeaming value.
Let's see,
Reach up, grab and cover for yourself first, then those nearby. Float under the seat, buckle up at all times (something that still amazes me those that dont

), exits two in front (follow with the hand movements

), two over the wing (e.g. 319), two in rear, the one in front or rear maybe closer so you decide however note the floor marked lights should work however may not. Leave personal items behind (you in 21B, leave that roller board where it is), dont smoke in the lavatories as its a fed offense and you will get a complimentry night stay in a facility that makes a super 8 look luxrious. If we are going over the water, then there's some more things about the life rafts etc. and be sure to use that little envolope in front of you if the food we give you makes you ill. There is an info placard in the seat infront of you if you need to more know about this xxx ac.
I know I missed some things comes I dont always pay attention to the whole thing however this is only a bit of humor on a very serious topic. Keeping a balanced and relaxed head in the midst of situations is also cited as a major saving force (well, maybe not laughing)

.
So brush up on those skills if you are rusty and if you have not yet pulled that seat belt extra tight, or grabbed your ankles on a landing hope you dont have to

.
BTW - Did you son enjoy the rest of the flight I hope?