QI Quote
[Talking about how Tube tunnels are cleaned]
Alan Davies: I don't understand why you can't have a—you know, like you used to have a cleaning tape for your cassette deck—you can't have a cleaning Tube? You'd just send a big furry train down …
Alan Davies: I don't understand why you can't have a—you know, like you used to have a cleaning tape for your cassette deck—you can't have a cleaning Tube? You'd just send a big furry train down …
TV Show: QI