[Avodah] lifnei iver/kanaus

[Akiva Blum]

>>> The case is as follows:
Reuven tried to steal the diamond. Shimon yelled at him, causing Reuven to
drop it. Reuven turns to run, Shimon chases after him with a knife
threatening to kill him. Levi, standing a few feet away, has only two
options - spray the blinding mace in Shimon's face, or pick up the diamond
that Shimon left for the moment because he was busy trying to kill Reuven
and yell out to Shimon that he has the diamond, with the plan being  to
cause Shimon to stop chasing Reuven out of concern for the loss of his
diamond.<<

Could I sujest a simpler case.
Reuven is attempting to kill Shimon. To prevent him, Levi must distract Reuven long enough for Shimon to escape. He yells and screams, but Reuven is too angry and cannot hear. Levi picks up a brick. He can either heave it through Reuven's car window, and THAT will get his attention, or he can throw it at Reuven's head. Which is preferable?

Akiva