[biltong]

I think doing

pawn Код:

public OnPlayerCommandText(playerid,cmdtext)
{
    if(strcmp(/flip,cmdtext,true) == 0)
    {
       new Float:X, Float:Y, Float:Z;
       new vehicleid = GetPlaverVehicleID(playerid);
       GetVehiclePos(vehicleid,X,Y,Z);
       SetVehiclePos(vehicleid,X,Y,Z);
       SendClientMessage(playerid, /*insert colour here*/, "You have flipped your vehicle");
       return 1;
    }
    return 1;
}

would do the trick. NOTE: UNTESTED!!!