What do you actually use the back side of engineering paper for?

I've recently started using engineering paper after a couple years studying ME but I've found zero use for the back side. The lines are too dark to take notes on and they don't completely flip over to the other side of the pad, cutting off a lot of space for titles and such. Pic related, its TOPS brand.

it's used to catch jizz

make a paper airplane and then calculate the lift and air resistance

that takes 2 side of the paper

The pad will stick then

For doing homework that isn't hand-graded? What's wrong with using it if you're not worried about aesthetic?

When using a mechanical pencil, whatever you write gets jumbled up in the bold grid lines. pen works fine but its not my preferred writing tool and it also obstructs the front side.

Came here to post this

Lines that are on angles

wtf, isn't engineering paper just graph paper?