How to create a bootable USB from Chrome OS

So I made a huge mistake and deleted the linux image I was using (didn't do the uname -r check before).
I'm currently downloading 16.10 to upgrade via USB but I need to create the USB on my chromebook since the one I'm trying to fix lost internet access and can't mount any external drive. I do have another partition for /home so I'll try to fix boot before losing all hope and my files.
How do I make the bootable drive from my chromebook?