Sussex finished the second session of the first day of the County Championship match at Horsham firmly in the driving seat at 149-4 with 39 overs completed.
This followed on from the dream start made in the morning when they dismissed Somerset for a remarkable 76 thanks to a career best bowling performance of Steve Magoffin who took an incredible 8-20.
Sussex faced a few overs before lunch and emerged for the afternoon’s play at 13-0.
Chris Nash lived up to his promotion of captaining the Sussex side by leading from the front and combined with Luke Wells to overtake the Somerset total with an opening wicket stand of 83.
Wells was first out, caught behind by wicketkeeper Jos Buttler off the bowling of Steve Kirby for 30.
Nash soon followed with the score at 87-2, bowled by Alfonso Thomas.
The Horsham star looked commanding during his innings of 46 in 74 balls, hitting four boundaries and along with Wells did not find the overcast conditions a problem in the same way Somerset had.
Joe Gatting soon returned to the clubhouse for four having been caught by former England star Marcus Trescothick at second slip off Thomas.
Peter Trego returned to bowl at the railway end and with his first ball bowled Mike Yardy for 15 with a delivery which kept low.
Rory Hamilton-Brown (21) and Matt Machan (11) then kept the score ticking over with an unbroken stand of 33 runs in 11 overs at the interval as the two looked well on track to give Sussex an impressive first innings lead.