but also to execute overtaking and

but also to execute overtaking and bump
drafting manoeuvres, commonly seen in car racing.
As a moving vehicle approaches the vehicle
ahead, it enters a low pressure region (partial
vacuum), or slipstream, increasing its speed. This
additional velocity is often seized to carry out an
overtake. However, it is also sometimes used to
push the car ahead to higher speeds, acquiring a
cooperative advantage against the remaining competitors.
The technique is known as bump drafting.