basically, im guessing around 80% or more of all handshakes i have experienced were aggressive is some way.
the common theme of handshakes is that the aggressor turns the palm to face downwards forcing the other persons palm to point upwards. this is the standard 'overpowering' handshake...then there is also pushing or pulling in weird directions usually aimed at offbalancing, displacing or sortof locking/holding in an uncomfortable or disadvantagous position..
i have not experienced it that often that someone really shakes hand hard or squeezing...my hands are fairly large so they would not be too easy to squeeze and i am very painresistant so i wouldn't even care much about the physical aspect. id be like...-oh firm grip!
basically the most common is the holding down or off balancing with a certain twist...
what is important is not stretching arm out too far because that puts you at risk of more easily becoming off balanced.
i thought the advice of tellner was very good by releasing grip and holding wrist.
speaking of aikijutsu, i would go with the flow and try to reverse the situation by not letting go of the hand and maybe pulling it down myself(maybe staying a bit on the right side of aggressor), because most people when the try to offbalance you, can easily be offbalanced themselves..having your palm facing up is not that bad and isn't really weaker in the physical sense...i sometimes try to reel them into me because although they push with the arms, there body will often retreat at the first realization of your resistance. also, it is a nice gesture,,like saying 'come to me-i want to be close with you or i trust you and want you to get closer. then many will retract all on their own.
in stephen k. hayessensei book, there is one move against aggressive handshake on a tenniscourt, the move is to jam the persons elbow into their belly by the right side hip area bend their wrist back lock and push inwards not allowing them to escape and then coming in for a judostyle legsweep-...
it might work and i kindof like the move although never really tested it that effective, but i don't think it is that realistic and if done with force will most likely only provoke a stronger counterforce. so it doen't really diffuse a potentialy simple issue but may just escalate things...not saying the move is bad or wrong either but i'd not want to use it unless the handshake is really bad.. and even then it might just be better to just exclaim...'ouch' when griped or 'wowsers!' if tugged..even if just facial expressions. after all at this stage the communication is still fresh and some people having stupid strategies should still be given a second chance.
well, speaking of aggressive handshakes, i myself did one recently about a month ago. it was at a club on a really congested dancefloor that this guy in his early 20s perhaps was acting all rambuctious and overdoing the drunk act by bumping into everyone and hitting them in sneaky ways...then he started pushing and bumping me. so i pushed back and stood strong unemotionally returning his attitude to him.
then he changed his strategy like he had been doing with some ladies there and started smiling at me acting like we were cool, so i accepted and gladly showed some friendship although i made it a point to not look too genuine...then he raises his arm inviting to shake hands in the powerslap kindof way...and then it happened, as he came in to shake hands, acting all drunk again he strafed my chin or neck area...not hard-it didn't hurt one bit-but i was momentarily annoyed because in all my training and fighting, i have never in years had even the slightest thing happen to me that was not calculated to my safety or the collectives advatange. at the moment i though-why did i not evade?? instantly i thought-what if it had been a knife- then i shook his hand, so hard i made him feel that if i wanted i could practically rip his arm out of it's socket. i think he got the picture and didn't enjoy shaking for much longer...we bumped around some more together after that it seemed more comical and i continued to bump back this time more friendly however, then something weird happened maybe he was on some weird drugs cause he just collapsed like a sack of potatoes in front of me.. a couple of people started trying to revive him...i was surprised so i just just stood there and didn't want to seem like i was responsible in any way cause people were staring at me maybe thinking that i dropped him..?? weird huh.? i still have no explaination. i mean, i didnt put any weirdmagic or nasty on him at all...i was just trying to communicative and not let myself get picked on. i think it was the booze or a combination of drugs..??
j