Silun slides forward into the space as well, determining to help even though he's not at all likely to force open something that his much larger and stronger friend.
As expected, when he tries to push the grate open he struggles against it for several seconds before giving up with a groan. As he eases off, the grate gives a quiet but audible squeak, and Silun looks up with a grimace, hoping that the people outside missed or dismissed the small sound.