Ticket Collector

The Provos were planning the takeover of Derry.
'Right, Liam,' said the CO of the active service unit. 'I want you to take Seamus and Francie and immobilise the train station so that the Brits can't use it.'
An hour later Liam came back with a large sack.
That was quick,' said the CO. 'Did you do a good job?'
'Sure,' said Liam. 'I got all the tickets.'