Caffeine withdrawal may not yet be recognised as dangerous, but it has a significant effect on the heart.
In addition as a joiner he's likely using power tools, possibly up ladders etc so from that perspective symptoms like dizziness, lack of concentration, nausea & vomiting, muscle cramps could prove dangerous.
Certainly when I was experiencing it, I had palpitations, extreme dizziness and fainted a couple times. Not just a case of 'not feeling great for a few days' it depends of course also on how much you've been consuming.
There seems quite an age spread with the kids, eldest seems early 20's, youngest 7-9? She doesn't look old enough to be mum to eldest!
Greenegg - yea, not only overweight, but also looked tired and possibly anaemic? Didn't look too healthy at all.
I hope the sons and dad continue to do a share of the cooking.