Qué pasada!- when something is amazing or really good. -Mira, este es mi nuevo coche -Buah, ¡qué pasada! Anda! -When you don´t trust in what someone is telling to you. as well it can mean surprise. -Hoy he corrido 48 kilómetros. -¡Anda! Madre mía, que ambiente!- "madre mía" has the same mean as "!oh my god" and you say "qué ambiente!" when you get into a place (bar, disco) and there are a lot of people, good music and good beer xD. -Entré al bar de la esquina... y ¡Qué ambiente! I hope the explanation could help you.