Claiming incredulity is a pretty bad argument.
Thanks for my new sig
. Presumably you'll be removing the Occam's Razor Wiki page now, which is a box set of argument from incredulity.
How credulous one finds something is subjective, but I'd suggest that there are more objective measures, like how many people find something plausible or whether any obvious mechanism can be understood between claimed cause and effect. If pretty much everyone who knows what they're talking about is calling bullshit on something then that is not irrelevant. And if there's no obvious casual link between the claimed effect and cause then that is not irrelevant either. And that's the difference between the Occam's Razor Wiki nonsense (rockets go really fast, that can't be right!) and this.
If I said that after a vaccine my arm hurt a bit then I'd suggest that most people would find that credible - there's a clear cause and effect there, I just had a needle stuck in my arm. Ouchie. If I said that after a vaccine I had the ability to fly then most people would not find that credible - famously, humans can't fly and there's no obvious reason a vaccine would give one that ability.
This magnetic stuff is somewhere in between those but I'd suggest towards the latter. There's no obvious reason that having a vaccine would cause one to become magnetic. Off the top of my head - maybe there's some magnetic substance in the vaccine which would cause the claimed effect. But
1) There isn't
2) Any metallic elements there are would be trace at best.
But OK, I've been vaccinated so I had a go and holy shit, I'm Magneto!:
(yes yes, I have a hairy arm. apologies for being so manly)
There are only a few minor issues with this.
1) I haven't had a vaccine for over a year, unless the claim is that this magnetism is permanent.
2) Those coins aren't magnetic.
3) That isn't the arm I had the vaccine in.
Apart from that, that's all very compelling evidence. The BBC link I posted above explains what's going on - tl;dr friction and other slight stickiness on the skin
As always, the credibility you give to "evidence" depends entirely on whether that evidence confirms what you want to believe.
And, as always, you probably don't believe any of this and are either trolling or wasting everyone's time or both.