UFC Fight Night 29 videos preview: Watch Demian Maia submission highlights online ahead of Jake Shields match

Disclaimer: Those on mobile devices and/or slow computers please forgive the three auto-loading videos below. Pause them all ... right now.

Ultimate Fighting Championship (UFC) is about to pull the trigger on UFC Fight Night 29, which takes place later tonight (Weds., Oct. 9, 2013) at Jose Correa Gymnasium in Barueri, Brazil, airing live on FOX Sports 1 network with a 7 p.m. start time.

And to promote the 170-pound main event between Demian Maia vs. Jake Shields, the world's leading mixed martial arts (MMA) promotion has posted several highlight videos of the former's finest finishes inside the Octagon.

The first offering is Maia's match against, Jason MacDonald -- a Canadian ground specialist who had several The Ultimate Fighter (TUF) skins tacked to his headboard -- back at UFC 87 in 2008. In a spirited affair that saw MacDonald stubbornly engage Maia on the ground for much of the fight, the Brazilian jiu-jitsu (BJJ) savant from Sao Paulo ended up taking out "Athlete" in round three with a rear-naked choke.

Watch the cream rise to the top:

MacDonald isn't really a slouch on the ground at all -- both Joe Rogan and Mike Goldberg detail his submission prowess. The now-retired competitor finished his career with 25 wins and a whopping 19 of them came via tapout of some variety. Honestly, check out his resume because it's pretty impressive to see people who can submit with such a wide array of attacks: armbar, keylock, guillotine, kimura, heel hook, scarf hold, rear-naked choke and triangle.

The end for MacDonald started at around 20:45 when Maia came out on the end of a position scramble in side control. He breezed into mount and started dropping elbows on MacDonald. The Canadian -- probably realizing he was losing the fight -- decided to try and roll to create a scramble. However, Maia smoothly transitioned to the back, kept his hooks in and after softening up MacDonald with a bunch of undefended lefts, he finally cinched up the choke.

That win bumped up Maia to 9-0 (he would run that to 11 before losing to Nate Marquardt via highlight reel knockout) and helped cement him as one of the most dangerous grapplers in the world.

This video is a nice addition to the other UFC media already available, including highlights of two of his other submission wins -- a fantastic triangle choke on current 205-pound standout Chael Sonnen and his rear-naked choke win over Ryan Jensen.

Check 'em out here:

There isn't all that much in this highlight, but then again, there wasn't all that much in the fight as a whole. Maia got the fight to the ground relatively early and didn't stop squeezing the neck until Jensen gave up.

Now this is just superlative, made all the more impressive by the run that Sonnen went on afterward that got him to a Middleweight title shot against Anderson Silva. The clinch takedown straight away into a mount and a triangle position, the roll to lock up the triangle and the squeeze until Sonnen was forced to tap.

Pure brilliance that Shields will have no choice but to defend with his brand of "American Jiu-Jitsu" later this evening at UFC Fight Night 29.

Remember that MMAmania.com will provide LIVE round-by-round, blow-by-blow coverage of the entire UFC Fight Night 29 card on fight night (Weds., Oct. 9, 2013), starting with the FOX Sports 1-televised under- and main-card bouts at 5 and 7 p.m. ET, respectively.