Interesting Fact about Rek'Sai
While I don't have a video, Rek'Sai can actually smite mid-ult. Can be pretty nice to try and setup a steal against what would otherwise be a suicidal dive into dragon/baron pit assuming vision. Just be sure to unlock your camera beforehand so you can actually click Dragon/Baron as you are flying by at mach 1. Technically this can let you get assist off of Sunfire as well while ulting through. Not sure if you can cast item actives mid ult, haven't checked that yet, but would be humorous to just get a fly by assist by blasting your Randuins as you went through the enemy to your actual destination.
Also, on other notes... For anyone new to Rek'Sai wanting to play her, standard build I use at least is Stalkers+Warrior, Mercs/Tabi, Randuins, Spirit Visage, Hydra, and a situational last item (Banshee, Sunfire, GA, Cleaver, or perhaps that new Zer'rot portal, or however you spell it, that is currently out on the PBE.) Devourer is a bit of a trap on her, as while yes, she can stack it easily enough, she has so many AD ratios that you get significantly more out of just the raw AD out of Warrior (For a point of consideration, it takes you like 1-2 seconds to clear a camp with the AD focus, with Devourer, it can take you somewhere in the range of 6-8 seconds due to your AoE not killing all the smalls at any decent pace.) She has a .4 bonus AD ratio on her Q (Which is applied 3 times, remember), a .5 bonus AD ratio on W, her E is 80-120% to 160-240% AD ratio, with the maxed damage being a true damage nuke instead of just physical damage. So she overall has a 1.7 AoE bonus AD ratio, and a single target of up to 5.4 total AD + 1.7 bonus ratio assuming all 3 AAs from her Q hits and she is max rage, and is at least level 13. That is just ratios, no base included. So for those of you who have noticed how scary a fed Rek'Sai is, that is why. She gets 285 base damage on her Q's 3 hits, and 180 magic from her burrowed Q. Add on 60-260 base damage from her W based on rank, and you see a base damage adding up to 545, which isn't much, but the ratios more than make up for it.