Leicestershire were forced to follow-on on day two of their LV= County Championship Division Two match against Hampshire.
Left-arm pace bowler James Tomlinson exploited the swinging bowling conditions with great skill as County were bowled out for just 143 in response to Hampshire's first innings total of 454-7 declared.
They will begin day three this morning 311 runs behind their hosts.
Leicestershire openers Michael Thornely and Niall O'Brien had to bat out the last two overs of the day without scoring when following on, but the damage had already been done.
Tomlinson made the ball move both ways to finish with 4-23 while another left-armer, Chris Wood took 3-30 as County collapsed from 31-0.
Earlier, Hampshire had resumed on 286-4 and had little difficulty in adding a further 168 in 39 overs.
Sean Ervine departed at 308, bowled by Matthew Hoggard, but James Vince was in imperious form, reaching his century with his 17th boundary off Shiv Thakor as Hampshire built a formidable total.
Vince and newcomer Adam Wheater added 104 for the sixth wicket in 29 overs before Vince lofted debut-making pace bowler Ollie Freckingham into the deep to Thakor.
Vince faced 236 balls for his 148 and struck 21 boundaries, but even then the punishment was not over.
Wheater, signed in the close season from Essex, blasted a rapid unbeaten 56 and Wood took advantage of a demoralised attack to make a swift 28 before being bowled by Jigar Naik to prompt the declaration.
Thornely and O'Brien gave no hint of the tribulations to come with an opening stand of 31 but when Wood had O'Brien caught at first slip by Ervine, the batting was processional.
Tomlinson's first victim was Thornely, followed in rapid succession by Ned Eckersley and Josh Cobb to make County 64-4, a position from which they never recovered.
Only captain Ramnaresh Sarwan hung around long enough to make an impression, hitting five fours in his top score of 25.
At 118 for nine, Leicestershire looked doomed but then last pair Hoggard and Alex Wyatt attempted to bring some respectability to the score with an aggressive stand of 25.
Hampshire fielders surrounded the Leicestershire openers when the follow-on was enforced but they survived to the close.
