Early this month, comedian, actor and occasional comics writer Patton Oswalt issued a call for help on Twitter: His 3-year-old daughter wanted to dress as Spider-Girl for Halloween, and insisted "Daddy has to be Doctor Ock-a-pus." The problem was, he didn't have time to make the required costume. Who should come to Oswalt's aid but Adam Savage, veteran special-effects designer and co-host of Mythbusters. The delightful results can be seen above.

"As sometimes happens, I just immediately saw in my head how to make a really easy-to-wear, inexpensive, fast-to-build Doctor Octopus costume," Savage explains. How inexpensive, and how fast to build? Well, he constructed the costume in just four hours using off-the-shelf crafting materials. See how in the video below.