Okay, this is an Euler's Disk.
The Big Bang Theory Season 10, Episode 16
Oh, an Euler's Disk, fun.
The Big Bang Theory Season 10, Episode 16
Okay, who had
Leonard gets a floppy DISK?
The Big Bang Theory Season 3, Episode 2
A floppy DISK?
The Big Bang Theory Season 5, Episode 5
can hold his breath
longer than the DISK can spin.
The Big Bang Theory Season 10, Episode 16