Fans and fighters alike are going gaga over David Onama and Nate Landwehr's absolute barnburner in the co-main event at UFC San Diego. Landwehr weathered the storm to push his way to a closely contested majority decision win over Onama.MMA Twitter erupted with applause for the instant classic delivered by Landwehr and Onama. UFC bantamweight Brian Kelleher tweeted while watching the bout:"This is mayhem right now #UFCSanDiego"Brian BOOM Kelleher@brianboom135This is mayhem right now #UFCSanDiego12613This is mayhem right now #UFCSanDiego'Boom' also noted that cardio could be the decisive factor in a fight like this.Brian BOOM Kelleher@brianboom135Cardio wins fight #UFCSanDiego111Cardio wins fight #UFCSanDiegoLightweight superstar Michael Chandler also praised the fight, emphasizing Landwehr's cardio. 'Iron' advised fighters not to punch themselves out against 'The Train'. Chandler tweeted:"Rule number 1…don’t punch yourself out against Nate The Train. This fight is fun. Onama’s crisp striking. Nate’s gas tank. #UFCSanDiego"Michael Chandler@MikeChandlerMMARule number 1…don’t punch yourself out against Nate The Train. This fight is fun. Onama’s crisp striking. Nate’s gas tank. #UFCSanDiego55918Rule number 1…don’t punch yourself out against Nate The Train. This fight is fun. Onama’s crisp striking. Nate’s gas tank. #UFCSanDiegoMichael Chandler@MikeChandlerMMANate The Train is an absolute savage. Must see fights. #UFCSanDiego129085Nate The Train is an absolute savage. Must see fights. #UFCSanDiegoShaheen Al-Shatti of MMA Fighting deemed the bout a 'Fight of the Year' contender. Al-Shatti wrote:"Go ahead and pencil that one onto all your FOTY lists. Absolutely bonkers. #UFCSanDiego"Shaheen Al-Shatti@shaunalshattiGo ahead and pencil that one onto all your FOTY lists. Absolutely bonkers. #UFCSanDiego1328Go ahead and pencil that one onto all your FOTY lists. Absolutely bonkers. #UFCSanDiegoUFC welterweight champion Kamaru Usman, surging contender Belal Muhammad, and bantamweight champion Aljamain Sterling, among others, also lauded the fight.KAMARU USMAN@USMAN84kgWhat a fight 🏿🏿 #UFCSanDiego1720115What a fight 👏🏿👏🏿 #UFCSanDiegoBelal Muhammad@bullyb170standing ovation amazing!!!!!48442👏👏👏👏standing ovation amazing!!!!!Aljamain Sterling@funkmasterMMATides are turning at the end of that round! Great scrap! #UFCSanDiego1026Tides are turning at the end of that round! Great scrap! #UFCSanDiegoAljamain Sterling@funkmasterMMALandwehr is a DAWG!!! #UFCSanDiego24114Landwehr is a DAWG!!! #UFCSanDiegoShane Burgos@HurricaneShaneBThat was highly entertaining! #UFCSanDiego24516That was highly entertaining! 🔥#UFCSanDiegoFans were equally impressed with the slugfest between Landwehr and Onama.Nuuf 🇨🇦@blazedbayman@brianboom135 @ufc What a fight. FOTY candidate@brianboom135 @ufc What a fight. FOTY candidatePaul A@loc12313@shaunalshatti One of the best I've ever seen.1@shaunalshatti One of the best I've ever seen.Delta Kaiju@KaijuonFNNate Landwehr Vs David Onama is easily fight of the night give them both 100k #ufc #UFCSanDiego13Nate Landwehr Vs David Onama is easily fight of the night give them both 100k #ufc #UFCSanDiego https://t.co/oJbwZkrSgiPC Strickland@PCSticklandMMANate Landwehr Vs Onama is just Professional Street Beefs lol.191Nate Landwehr Vs Onama is just Professional Street Beefs lol.Nate Landwehr calls out Billy Quarantillo and Shane Burgos after UFC San Diego winNate Landwehr and David Onama started at a frantic pace, taking the fight to each other from the initial bell. 'The Train' was dropped in the opening frame itself but managed to recover and land some significant damage of his own.Although Landwehr took the majority of the damage in round one, he was visibly the fresher fighter going into the second round. Onama displayed immense heart, managing to stay in the fight despite appearing to have emptied his gas tank. The Ugandan even dropped his opponent in a frantic exchange in the closing seconds of the bout. However, 'The Train' did enough to earn a majority decision victory in the end.In his post-fight octagon interview, Landwehr issued call-outs to featherweight prospects Billy Quarantillo and Shane Burgos. The 34-year-old said:"I'll tee-off on Billy Q, I'll downgrade Hurricane Shane down to a thunderstorm."Watch Landwehr's post-fight interview below: