Momoweb's Motion-G cellphone force-feedback
We weren't really aware that pluggable force-feedback devices for cellphones were a hot commodity (keep your mind out of the gutter!)—especially when most cellphones can already vibrate—but that didn't stop Momoweb from making the Motion-G, which apparently can be inserted into pre-built slots in Korean phones for enabling a more immersive mobile gaming experience by way of jigglin' that phone.
[Via textually]