So I started a new character and went directly from clap traps place to Oasis to see how much trouble I could get into at level 1 with no shield.
Somehow I managed to open the entire Oasis map without dying, it was amazing, the most tension Ive had playing this game for sure. Getting across the bridge to the cursed pirates was the worst/best part, died a split second after I completed the map there.
So I challenge you to try and open the map of Oasis with no shield prior to killing anything with that character! You are allowed one death max and are not allowed to kill anything if you figure out a way to do so... Also for an added challenge, loot at least 4 weapons chests.