This is a video demonstration of German robotic firm Festo's Octopus Gripper, a pneumatic robotic arm directly inspired by an octopus tentacle (it's hard to not notice). It can pick things up, it can set things down, it can wiggle its way into your orifices. "What?!" Nothing, nothing, you'll see.
Keep going for the video.
Thanks to Greg, who agrees the only cool robotic arms are the ones attached to arcade arm wrestling games, which I am great at.