JDM Tsurikawa (Train Handle) Trick Oh-Shit Bar?

I'm looking at making a trick oh-shit bar for my '89 B2200 with a Tsurikawa train handle. I drive like a dick when I have passengers (I can drive normally too, but this is just fun) and I always see them going for the oh-shit bar, I kinda want to get a Tsurikawa (mainly because it matches the theme that I'm going for) & make it so that whenever someone grabs onto it it'll just fall off to scare them a bit more...

How would I go about making it look like it's installed into the car but have it just pop off when someone grabs it? Would it be like a special bracket, or something I'm not thinking of? Any ideas?

And I do intend to remove my OEM oh shit bar so they don't have anything else to grab onto... :P

This is what I'm looking at in case you guys wanted an example.

Get one from an older VW Bug or Bus. I need one for my wife when she rides with me. ;)

That's the best response I've read lmao!