This is a great story, and one that makes you appreciate the internet a bit more. Patton Oswalt’s daughter really wanted her dad to be Doc Ock (Doctor Octopus) to go with her own Spider Man costume this year for Halloween. Patton did some digging and couldn’t find a good costume on the internet, so he posted a tweet asking for help.
Adam Savage from Mythbusters happened to read the tweet, and decided to help out.
Using some inexpensive components, and only 4 hours of his time, he created the Doc Ock costume for Patton. Here is a video of Adam explaining how he made it: