Opening Sequences and Characters - Introduction

I've already looked at a number of opening sequences and have found that one of the main purposes is to introduce character. So I've decided to look in more detail at 2 opening scenes that focus on introducing characters and discuss how those characters are introduced. The 2 films I've chosen to analyse in terms of the way they choose characters are:

'The Wolf of Wall Street'

'Ferris Bueller's Day Off'