He might be a confident filmmaker, but when it comes to being a father, Anubhav Sinha fails to keep nervousness away.

Sinha, whose last film "RA.One", minted money at the box-office, shared his feelings with his followers on microblogging site Twitter.

"Son participating in inter-school Judo competition and I am nervous. Various facets of fatherhood keep dawning upon you...," Sinha wrote on his Twitter page.