GTA:SA Highjack Duping using Bike School @tduva
GTA:SA Highjack Duping using Bike School  @tduva
Uploaded November 2015 | Updated September 2026, 1 week ago
You only have the Catalina call for this, which is on a 60s delay, so after failing Highjack to get the bike you have to wait at least 60s after you enter the Bike School marker (which shouldn't be a problem since the drive takes about that long).

You can do Quarry style duping with the Bike School marker, which means the call is already ready when you get off the bike into the marker (and possible pause buffer a bit).

Once have started Bike School and have the call ringing at the same time, hold the call and quit Bike School, then just drive back and do the dupe.

How to hold the call is explained here: youtu.be/nBfIiummlFs?list=PLbIWfVsXgVgNRml7e0IHla_c3goKuG45o

Phonecall Information: kb.speeddemosarchive.com/Grand_Theft_Auto:_San_Andreas/Game_Mechanics_and_Glitches/Phonecalls

I did not find this duping method, I merely tested it and made this video.
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GTA:SA Highjack Duping using Bike School

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