The Talmud in Megillah bring this incident:
רבה ורבי זירא עבדו סעודת פורים בהדי הדדי איבסום קם רבה שחטיה לרבי זירא למחר בעי רחמי ואחייה
Rabba and Rabbi Zeira prepared a Purim feast with each other, and they became intoxicated to the point that Rabba arose and slaughtered Rabbi Zeira. The next day, when he became sober and realized what he had done, Rabba asked God for mercy, and revived him.
I ask for a friend who doesn’t expect anything of this nature to arise, but if it does, how can he perform such reviving techniques - if at all?