Usually involves something medical but can involve anything serious.
They used to seem like they had everything. They lived well beyond their means. Most people thought they were rich. It took almost losing their house for them to start opening their eyes and living within their means. It was a real wake up call.
Roy: Ahhh ahhhh cold cold, *cough* *cough* *gag* *gag* what the...damn it.....MIKEY!!!!!!!
Mikey: Hahahaha wake up call!!!!!!
Manager: Why are you late today Duncan?
Duncan: Sorry it's too obscene to mention
Duncan: I stayed the night at my friend's house and he gave me a wake up call.
(Receptionist): "Do not worry, they will ake up with gladness!"
"You've just unleashed a WAKE UP CALL!"