What I do in these situations, is relate it to HL2 even if it ends up sounding stupid.
For example: Guys, is it normal if I haven't grown pubic hair yet? I'm 20 BTW.
Now to relate that to HL2, well that's the simple part:
I'm sure if HL2 came out it would make me into a man for sure...
Which one was Scaffold? I can't launch the game to find out myself, but is it the park with steps to a deck or is it a construction site just like the contruction site map?
There's 5 different maps you can choose from. Enemies keep respawning. Your goal is to survive as long as you can. My record on the Manor Yard map has been around 18 minutes so far.
I bought MP2 on the first day it was released and beat it two days later (which was yersterday the 17th). Currently, I'm playing on Dead Man Walking mode. Rocks.