Franklin's seven skittles Derbyshire for 44
Derbyshire 44 and 127 for 4 v Gloucestershire 156
James Franklin took career-best figures of 7 for 14 as Derbyshire were bowled out for just 44 on a day in which 24 wickets fell at Bristol. The visitors survived for only an hour and a quarter against the swinging ball on a greenish pitch as Franklin took five wickets in his first three overs without conceding a run.
That was just the start of two crazy sessions in the County Championship Division Two clash, which saw Gloucestershire dismissed for 156 in reply, Steffan Jones claiming 4 for 26, and ECB pitch inspector John Jameson summoned from Birmingham.
But by the time Jameson arrived batting conditions had improved. He left satisfied nothing was untoward after speaking to the umpires and Derbyshire closed on 127 for 4 in their second innings, leading by 15.
Derbyshire were 9 for 6 at one point in their first innings, having been invited to bat under a cloudless sky. Jon Lewis had Wayne Madsen caught behind in the first over and Franklin then removed Chris Rogers, Chesney Hughes, Greg Smith, Wes Durston and Jonathan Clare in an amazing burst from the Ashley Down Road End.
Bowling full and swinging the ball, the New Zealander looked to have virtually won the game in the first 25 minutes, gaining three lbw decisions and two catches. He added the wickets of former Gloucestershire player Steve Adshead and Graham Wagg before being taken off after six action-packed overs.
Robin Peterson top scored with 15 as the visitors were blown away for their lowest score since 1975 - when they made 42 against Lancashire at Buxton - and their lowest ever against Gloucestershire.
Lewis finished with 2 for 13, while the country's leading wicket-taker, Gemaal Hussain, was barely required and bowled four overs for 15 runs.
Batting looked no easier for the home side as they slumped to 30 for four in reply, Wagg claiming two of the wickets. But Hamish Marshall (45) and Chris Taylor (37) put together a stand of 69 and Gloucestershire looked to be building a significant lead.
They were 132 for 5 at one point, but then imploded to the bowling of Jones, who took four wickets in five balls bowling from the Pavilion End. He dismissed debutant Jack Taylor and Lewis with successive deliveries, narrowly missing out on a hat-trick as Hussain survived a loud lbw shout. He was judged leg before to the next ball and at the start of his following over Jones had Steve Snell caught in the covers for 31.
Second time around Derbyshire openers Rogers and Madsen took the score to 58 before a mix-up over a single saw Rogers run out by Lewis's direct hit. They had almost wiped out the 112-run deficit when Madsen was caught behind off Hussain for 39.
But Wes Durston and nightwatchman Tim Groenewald also fell in the closing stages, leaving Gloucestershire favourites to complete victory inside two days.