hah!! HaH!! actually I have seen this done in reality, what has gone on here is that he/she has a dripping tap and doesnt know how to or cant fix it, so to stop the wastage they "plumbed" it to the loo, that's why the sink is full as well
very funny to see it the first time though, kids nowadays havent the skills needed to do things like replace a tap washer so they must come up with ideas like this
If your toilet is clogged and filled to the very top brim with water, here is a way to get the water down without flooding the bathroom,then use a toilet plunger and slowly guide the plunger into the toilet making sure you dont get water everywhere and flush the toilet to be sure the toilet will drain. Even if you are unable to fix it, you urgently need to contact the plumber.