That was a setup. Bob Dylan's excessive nasal hair, which lent him his distinctive vocal style, often got painfully stuck in his harmonica. In 1965, as now, no wet razor safely dealt with the problem and the folk cognoscenti would never countenance using an electric razor (seen as the talisman of the square-jawed corporate American - see Zappa - A Life ch7: "How Weasels Ripped My Flesh" was an Even Bigger Social Comment than "Burnt Weeny Sandwich").It was Bob Dylan's band. He kicked them out for suggesting he play an electric guitar. And then he did it anyway.
Knowing he would be sacked soon, a vengeful Mike Bloomfield presented Dylan with a Gibson Flying V (observers said it was like presenting a Cro-Magnon with a Nespresso machine) and convinced him that it was a plug-in razor acceptable in hip circles. What was actually Bloomfield's pic of Hendrix playing with his teeth lulled Dylan into thinking he could use this method of trimming his nasal plumage without opprobrium from the beardies in their black polo-necks. The plot also involved Bloomfield's use of a Sharpie to change "Gibson" to "Gillette" as Dylan had recently written his anthem for a generation, "Gille-ette: the Best a Man can Ge-et!"
As Dylan wobbled, Bloomfield sealed it with an affidavit of acceptability; not from the Organisers of the Newport Folk Festival, but from the Festival of Organised Folk of Newport - an obscure Welsh sect that prided themselves on their a.m. and p.m. razor ritual (motto: "No 6 o'clock shadow, didn' you?")
Dylan took the stage, fearful of the harmonica, raised the Flying V to his clenched teeth and - a change to the set-list that only worsened the situation - launched into a searing "Whooaah! Bodyform for Yoouuu..."
Dylan's career was finished and he never did anything relevant again until his well-received 2016 Ad jingle for IBM while Mike Bloomfield, fearing retribution, changed his name completely to Mike Oldfield and became an obscure promoter of tuned brass pipes of graded length.