Easy way for this trophy if you don't mind being a bit of a prick
On that night snow level (forget the name >.<) both of the first two crates are in buildings that can be demolished, the right two story one being the easiest.
Now this works as both an attacker and defender, but better as an attacker so you don't **** the team over, to the assult kit, with extra C4 and explosive damage, throw a c4 in each courner of the house (and two in the middle for good measure) Arm the crate and hide in the roof. As the defenders run in to disarm the crate, Boom city
quite an easy way to get the trophy imho.
Good luck!
