Lava Lamp Larks On QI.

[Aladdin 2 Lava]

Skip to 3:50

http://www.bbc.co.uk/iplayer/episode/b04vw0k9/qi-series-l-11-lumped...

[Keith]

Bummer:

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[Aladdin 2 Lava]

Here you go... skip to 3:15.