Bout was immediately waved off before the former middleweight champion was carried out of the Octagon on a stretcher
Weidman (15-6), who defeated Hall (17-9) via first-round knockout in 2010 before either fighter had made it to the UFC, was himself stopped in the first round of the pair’s rematch, sustaining a nasty injury just 17 seconds in.
Weidman threw a leg kick, which Hall checked, and the American immediately fell to the mat in agony.
The contest was at once waved off, with Hall declared the winner.
Hall was unable to watch as Weidman was treated, before the former champion was carried out of the Octagon on a stretcher.
Bizarrely, Weidman was on the other end of an almost identical stoppage in 2013.
Having won the UFC middleweight title from the legendary Anderson Silva, Weidman defeated the Brazilian again in the pair’s rematch, with Silva’s leg breaking as Weidman checked a leg kick in the second round.
UFC 261 marked the first UFC card to be held in front of a full house in more than a year. A full-capacity Veterans Memorial Arena in Jacksonville, Florida, hosted 15,000 fans.