Gemara:

Menachot 

Halacha:

Sefirat HaOmer 

Machshava:

Sefirat HaOmer 

Collections: R' Grunstein The Rabbi Forgot to Count

References: Menachot: 66A  

Description

If a Rabbi forgot to count sefira one night, and thus shouldn't say a beracha thereafter, there is a "trick": to still say the Beracha: have someone in the shul NOT say it, standing next to you, and you say it on HIS behalf.