Okaaaay...
You travel 40' east, checking all the way but not finding any secret doors. At the 40' mark, you come to a door in the north and a door in the south. The passage continues east for at least 30'. Standard checks at the north and south doors reveal no traps on the doors and no noises behind the doors.
This all takes 5 turns total, so you need to rest a turn. As you are resting, the south door opens and the first two of several ugly, larger versions of the gray-skinned humanoids you fought on the first level come strolling through. They see you and do a double-take, grabbing their weapons. However, neither is surprised.
Round 1 - Party has initiative.
(You were in the middle of resting so you have a -1 and all "to hit and damage" rolls)