You turn slowly, your hands are out in front of you searching as are your slow shuffling feet. If you were groaning you'd probably resemble a zombie... you might find that funny if you weren't in a pitch black room or wherever without a clue of how you got there! The rushing water you heard early begins to disappate, but you can't be bothered by that now.
You come to an opening of sorts and it seems that there are stairs, or something, leading down...
You:
2.) Further inspect the room? (Available)
3.) Call down there stairs? (Available)
4.) Sit and wait? (Available)