He is in Azkaban and has been dreaming of punching Severus in the face since Severus punched him (Lucius) so hard that he’d ended up flat on the floor at the end of the Malfoy trials.
Okay, and why did Severus punch him? For being a bad Slytherin?

You're right about Blaise being informed about Muggle culture. I do keep underestimating the Slytherins... I wonder if there might be joint Slytherin outings to the Muggle cinema watching Avengers and gossipping about Muggles and their versuon of Magicians which they call 'superheroes'. :)