Grand Theft Auto: San Andreas/Stowaway

'''    Hi man! Hey can u help me with this level "Stowaway" cause I can reach that motherfucker plane, u know Some help? a little, pleeeease!'''

It is definitely possible. Try starting with a slight wheelie on the bike, and go through the agents. Approach the ramp from the left hand side and you should just make it. One mistake, be it not starting quickly enough or being hit by a barrel will cause you to miss the plane. Perfection's the only way, unfortunately! Tom.