Tranquillamente; senza fretta

Se ne andava bel bello verso casa, quando un cane lo ha assalito

He was leisurely walking home, when he was suddenly attacked by a dog.

Pensavo che Lisa fosse a casa a studiare per l'esame e invece l'ho vista che se ne andava bel bello in centro con le sue amiche

I thought Liza was at home studying for her finals, when I saw her casually walking downtown with her friends, taking her own sweet time