1. The numbers aren't entered in time and the hatch goes into "lockdown" mode which means that anyone in there can't get out.
2. Hurley gets caught with yet again another cache of food so they lock him in the cell with Henry (I think a mind game contest between those two would be hilarious and Hurley would win
)
3. A group of Losties gang up on Sawyer and get the guns from him and put him in the cell with Henry (which wouldn't be as good as Hurley cos Sawyer would just kick Henry's a$$ the second time he tried to talk).
4. Jin and Bernard have enough of Jack and Locke being the "leaders" and put together a coupe.
5. Other Losties begin to develope Aaron's sickness.