"Knock, knock, knock, Penny…" But seriously, the first thing I thought of was Doctor Who. Knock, knock, knock, knock.
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Another great knock knock joke!
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Knock, knock, knock...Penny?? One of the funniest interactions of the show!!
'KNOCK KNOCK!' (@knockknock0408) | Twitter
*This is from a hilarious British TV show David Tenant hosted called "Never Mind the Buzzcocks". (It's A British slang word btw) You can see the full clip on YouTube by searching either that title, or David Tenant then scrolling through tons of results :D if you're a Dr who or David Tenant fan it's worth the look :) BTW I get new people re-pinning this one pin nearly every day. My notifications panel says 48+ people pinned it :D cool
(3) 'KNOCK KNOCK!' (@knockknock0408) | Twitter
The Big Bang Theory - Knock knock knock Penny! http://stg.do/utLd