A senior figure in the Rail, Maritime and Transport Union volunteered to come in and co-host a talkRADIO show during a heated debate with James Whale.
Speaking after yesterday's tube strike, Steve Hedley told James that it was far easier to be a "bigoted" radio host than drive a train. So James invited him in to put the theory to the test.
The fractious interview began with James sarcastically applauding his interviewee and degenerated into bickering, with James accusing Hedley, assistant general secretary of the RMT, of being unreasonable and suggesting strikes should be banned.
He said: "If you think you are justified to hold the travelling public to ransom like this, the sooner the Government pass legislation to stop public transport strikes, the better."
When Hedley asked James if he'd like to "reintroduce slavery", our presenter lost it.
Yesterday saw chaotic scenes as London was brought to a standstill in a tube strike. Today sees the start of three days of industrial action on Southern Rail in a long-running dispute over driver-only trains, leading to further travel misery for commuters across today, tomorrow (Wednesday), and Friday.
Listen to the clip above.