[codetrotter]

Imagine a bicycle messenger in lime green sports clothes with a dark green box on his back, followed by two guard motorbikes all black, carrying big guns. And the motorbikes riding comically slow in order to stay with the bicyclist. Even struggling to not tip over, because of how slow they are going at times.

[barkingcat]

More like a motorcade of motorcycles, 3 at the front in arrow formation pushing out the traffic, the forward section not shy about using their guns to move people away - these would be real NYPD with badges hired during their off-duty hours, they would be carrying NYPD weapons.

Then you have the main security cordon, a quad / box. They would be on motorbikes, but it would be like guards, and since the traffic is already cleared by the forward section, it would just go at the fastest speed the cyclist courier can go.

The cyclist is in the middle of the quad/box.

Then at the back you have a rear section (also 3 NYPD off duty cops on motorbikes with firearms licenses and authorized to shoot with no consequence because they are union protected), which will block traffic from coming too close to the courier.

[notnaut]

Sounds legit, but also reads like good fanfic without anything provided for external confidence.