My understanding is that the highside always has that wobble. This is the tyre losing and then (fatally) regaining grip just before the crash. It’s the regain of traction that causes the vector of force towards the outside of the corner that throws the rider over the high side of the bike.

This is the death wobble for people who don’t know. https://youtu.be/eoc1EM6yUSc

In this video the rider handles it perfectly and doesn’t crash but you can easily see how this has caused many crashes. As I understand it, it is a harmonic wobble after hitting a bump that intensifies and is due to a flaw in the design of the rear suspension on some Harley Davidson models that they have chosen not to fix to keep the designs authentic. Make of that what you will.

Another terrifying variant on the “death wobble” is the “tank slapper”. This is typically caused by a flaw in the front steering (specifically having the steering geometry too vertical). Having the front forks close to vertical makes the bike handle very fast so is favoured by sports bikes however if the bike steers too quickly and hits a bump the steering will veer uncontrollably from side to side eventually causing the riders wrists to hit the sides of the petrol tank as the bike careers down the road weaving uncontrollably. The most terrifying part of all is slowing down makes a tank slapper worse so pretty much the only way it’s possible to recover from a tank slapper is to accelerate hard, get the front wheel off the ground and put it down straight. As a rider even thinking about the prospect of accelerating hard when in that situation makes me feel sick. Tank slappers are prevented by fitting a steering damper. I had a (crazy) friend[1] who bought a bike that was infamous for tank slappers[2] and then remove the steering damper to “see what would happen”. He had a tank slapper on the West Side Highway in Manhattan.

[1] Hi Kirat!

[2] Old Suzuki TL1000s

Highsides are unrelated to tankslappers - it is a totally different concept, as discussed in another post. As stated in the article the highside is caused by rear breaking traction and then regaining it while the bike is crossed up, sending you either over the bars or skyward. My own recent highside (6 weeks ago) was caused by an engine seizure after a downchange from fifth in a third gear corner in qualifying. I had the bike leaned over, let out the clutch lever and because of the lean angle the bike rear kicked to the left, grabbed, kicked right and threw me over the bars. Well, so I was told - I do not remember the crash, waking up in the medical centre.

Highsides are particularly nasty, especially if you are knocked out so that you cannot control your crash and get rag dolled.

The rider into the video is putting some really ham handed inputs into the motorcycle. It’s not a wobble, bikes don’t “wobble” at lean, it’s a culmination of looking at the front wheel, forgetting where they are in the turn, surprising themselves about how close they are to the line, scaring themselves about the cliff edge, while being shocked about what the bike is doing. The person on the bike has stopped riding, the bike was riding them at that point. It’s a good example of someone way out of their depth on a capable motorcycle.

They're effectively the same process occurring to different degree. A high side is what you get when you arrive at a point of unrecoverable inflection in such a wobble.