Over the hundreds of matches played between the rivals, players and staff have been involved in many incidents beyond the usual bad tackles and red cards commonly associated with derby matches around the world; in the modern age of video footage, such incidents are more frequently observed, reviewed and scrutinised. In 1987, four players were charged by the police with breach of the peace for their conduct during a match at Ibrox and had to appear at court,[1][57][58] with two (Chris Woods and Terry Butcher) convicted and fined.[59] While warming up on the touchline at Celtic Park in January 1998, Rangers' Paul Gascoigne was caught on television reacting to verbal abuse from the stands by briefly miming the playing of a flute (representing "The Sash" and the typical repertoire of songs on an Orange walk, considered an offensive gesture by Celtic's many supporters of an Irish Catholic background).[50][60][61] Gascoigne, who had pleaded his ignorance of the situation after he made the same gesture in a friendly just after joining Rangers in 1995[62] and had been sent off on his last visit to Celtic six weeks earlier,[63] was fined for the provocative act[64] and left the club later that year. He has stated that he later received threats via telephone calls from persons purporting to be members of the IRA over his behaviour.[61]