[ISmokezU]

Let's assume that you're using player textdraws.

PHP код:

public OnPlayerExitVehicle(playerid, vehicleid)
{
    PlayerTextDrawHide(playerid, speed[playerid]);
    PlayerTextDrawDestroy(playerid, speed[playerid]);
    return 1;
} 


If not. Then you're probably trying to hiding the wrong textdraw.