This glitch allows you to kill your target in the Arid desert in a more interesting way than just shooting him.

1) Load the mission "End Of The Road".
2) Walk to the five vultures surrounding him to scare them away.
3) They will not be hard to find and they will fly into the sky above you.
4) Pick up the sniper rifle from the boot of Agent 47s car.
5) Standing next to the car boot, shoot the three vultures to your right.
6) Then, kill the next vulture to your left.
7) Finally kill the vulture furthest to your left.
8) The target will begin to move forward and then stand still.
9) Wait for a few seconds and you will hear an engine.
10) If you did the above steps correctly and ice cream truck will come from nowhere and run him over finishing his life.

Here is a video tutorial from Youtube in case of any issues.