[s5e7] Breaking Branches Online

: Walt kills Mike in a fit of impulsive rage after Mike bruises his ego by telling him, "You and your pride and your ego... you just had to be the guy."

: Immediately after shooting him, Walt realizes he could have simply gotten the names of Mike's men from Lydia, making the murder entirely unnecessary. [S5E7] Breaking Branches

This episode marks the definitive point where Walter White’s ego completely overrides his pragmatism, leading to the "breaking" of his professional and personal foundations. The Death of Mike Ehrmantraut : Walt kills Mike in a fit of

: The cold open features Walt demanding Declan and his crew acknowledge his reputation as "Heisenberg." [S5E7] Breaking Branches