Not all armour works as it should do, and these thirty suits of armour all have something wrong with them. (Until I can get it fixed somehow, only the main page link to this submission is working.)
The PCs come across a wild thicket of luscious looking blackberries. They eat the berries and become drunken fools. Later they find out that the berries were part of a fae garden and were intended for fae wine. In payment for stealing the berries, the mischievious fae make life inconvenient for the PCs. Horses are untied, water skins are drained, spare clothing is drug into the water, etc.