How about turning the entire device over and shaking it, like you do with an Etch-A-Sketch?
That would be a pretty cool app for a drawing pad. Etch a sketch.
Reminds me of a discussion with a former co-worker a few years ago (I'm long retired). He mentioned watching a music video on YouTube where all the instruments in the band were iPads. He was berating some musicians for faking it by shaking the iPad and tapping on it as if they were tamborines or other instruments. I informed him that the iPad has internal sensors that detect motion and position, and that it does indeed simulate music instruments when shaken and turned upside down for music apps. They're amazing devices, and one might not know the usefulness unless actually using one. Probably why Microsoft came out with the Surface after their CEO knocked the iPad years prior as unnecessary. More options are a good thing, as I'm sure Surface owners would agree.