Bob Dylan made a surprise appearance at Farm Aid last night (September 23), marking the first time he’d appeared at the charity concert since he helped to conceive it.The annual event was founded by Willie Nelson and has taken place since 1985 and raises money to support family farmers in the US. The idea came about when, during his performance at Live Aid to raise money to help support farmers during the Ethiopian famine, Dylan wondered whether a similar event could be worked on to support American farmers.