A late burst of wickets in the evening session left Nottinghamshire poised to claim victory in their opening LV County Championship match of the season.
After being frustrated by Worcestershire batsmen Daryl Mitchell and Steve Davies - who both batted for more than five hours - the visitors were finally bowled out for 354 shortly after 5pm, two runs short of avoiding the follow-on and almost certainly defeat.
Stuart Broad completed his first five-wicket haul for Notts, finishing with 5-79, while Samit Patel picked up two wickets in two balls and Graeme Swann claimed three victims, including the crucial final man Matt Mason caught and bowled.
Notts skipper Chris Read duly enforced the follow-on and an inspired burst from Kiwi Andre Adams left Worcestershire reeling, as he despatched opener Stephen Moore and nightwatchman Chris Whelan in the space of three balls, before Mark Ealham found Mitchell's edge for a third wicket before the close.
Worcestershire finished the day on 24-3, still 127 runs behind, and the only concern for Notts is that fast bowler Darren Pattinson spent most of the day off the field with a sore ankle.