Don't quote me on this, but I think the position of the Hoodstormer is - unfortunately - RNG-based. As far as I know, there's 2 spots where he could be in; one of these spots being behind the teensie pillar (which is the spot where you can get him in Combo without any problems) and the other one is on the other side of the bridge (meaning, like, 10 miles away from you). He constantly changes his position between these 2 places, and I'm afraid that his location at the time he WOULD be killed is solely down to luck
Some other stuff I want to get out of the way:
BOM1 - The first Red Gem in Combo
Unfortunately, you can't get all 3 Yellow Gems in Combo if you go for this; to get the required fall speed, you need the extra height from the Throttle Copter.
In this Part, I also tried to stand on the edge of the mushroom with the TC on it, then roll off to swim through the swamp to then get to one of the gems on the other side with a powersuit, but the TC always ran out literally as I got there. Anyway, with this you can now get 3.190 after Part 1.
CF2 - The Tribelle-Combo (retarded version)
I was stupid and took the other 2 Gems before I made the video, but yeah, this is how you're supposed to get the second Tribelle for 1.500. This Combo is straight-up cancer; try playing it and see why for yourself.
CF2 - The ultimate Hoodcamp-Combo
Unfortunately, it seems like my Powerup-Timeframe is very slightly extended whenever I'm recording (maybe because of the fluctuating framerate or something). Normally, you can't kill the Hoodblaster in front of the gate with the Lockjaw, but since you can just equip the HMF and run back to get him, that's not really a problem. The reason why this is an issue is because in the video, it seems as if it might be possible to just get the 3 Yellow Gems on the ledge with the HMF and then simply collect the Red Gem without a Powersuit (which would be worth even more Points), but when not recording, I could just barely get the Red Gem without having the HMF run out. Just to let you know. Also, note that you can gain another 40 Points by getting the first Red Gem as item No. 5 (4 Yellow Gems + breaking the Piggybank beforehand).
SBTC3 - 3-Hoodlock-Combo
I was talking about this before. This combines 2 areas; I missed out on some kickflips which could've made the Combo even bigger, and my attempts at making the connection between the 2 Hoodlocks possible otherwise were unsuccessful so far, but who knows - maybe we can do something with this one day...
SBTC3 - Some extra Kickflips in the final Combo
The Kickflip before the Red Gem I mentioned. At the second spot, you can actually get stuck on the wall and perform a ridiculous amount of kickflips (I once got from ~800 to 3-4k-ish Combo-Points just because of that). Also, you can ideally get 4 or more kickflips by falling down (instead of just 2 like in the vid). Afterwards, you're supposed to just drive back up and get the additional Flip on the left side, but I messed that up on my attempt.
If everything works in your favor, you can potentially get a final Combo worth 15k+ this way; which still a long shot from MandM's Score, of course
FC: 54.450 | CF: 131.900 (PB: 134.150) | BOM: 100.899 | LOTLD: 122.619 (PB: 123.839) | DOTK: 118.640 | LS: 43.110 (PB: 43.470) | SBTC: 110.479 | HH: 120.609 | TOTL: 118.689
Total: 921.395 (old savegame, current Total: 902.045)