How long did the students have to complete the instructions after the teacher brought them up on the projector?

Choices:
A. Thirty minutes.
B. not enough information
C. Fifteen minutes.
D. Twenty minutes.
Twenty minutes.
Back in middle school, at least I think it was, I had art class. I didn’t particularly love it but it was interesting enough at the least to hold my attention.
We got to class and the teacher pulled up a list of instructions on the projector. She had each of us follow the instructions and she gave us 20 minutes to complete all of them. It may even have been a bit of a race too, to see who finished it first. This becomes a lot more evident in a second.
I can’t recall the exact details of the instructions, except that clearly it had to do with art such as having to draw a bunch of things. Anyways, we all went one by one down the instructions getting increasing nervous as to try to be the first one to finish. The class goes quiet while we work.
Then I get to the last instruction which reads something along the lines of:
“Step 15: Skip steps 1–14 and put your pencil down.”
You gotta be freaking kidding me.
We’re all so confused and mad at ourselves for not reading the whole of the instructions first. She turned this into a lesson for how we need to learn to read all the instructions first and then start, which was pretty clever. She got us! I remember this vividly to this day.
But I look back now on this “prank” and I realize that she was kind of…wrong. Sure if the instructions are short like 15 steps it might be good to glance through before you start. But what about a whole load of instructions? Who the hell is going to read through the instructions for how to build their Death Star LEGO set before even starting to build it. Just a waste of time really.
Note: I have never built a Death Star LEGO set.