[from
here]
Now they were outside, and the level of possible danger had risen. Making a run for the greenhouse could attract more attention than trying to make their way by stealth, what with their dampened abilities. Sai drew his machete and kept it low, knowing that any larger enemies wouldn't find it much of a threat. It would be useful if they were found by giant rats again, perhaps.
He motioned for Shikamaru to keep close. Luckily, the greenhouse wasn't far and they should be able to reach it quickly. Once they'd collected the metal, night coming to a close wouldn't be a problem. One simply never knew when that was going to happen.