Teebo suffers the effects of the perilous laughing spell.
The perilous laughing spell was a type of magic that one could catch by making contact with a loonee bird. This enchantment made the afflicted individual laugh without control, an affliction that had the potential to affect the person for the rest of their life, and also have a temporary effect on those in close proximity. The only known remedy was tears acquired from Mount Sorrow. The Ewok bard, Teebo, was at one point impacted by this spell, but ultimately found a cure through the tears of Mount Sorrow.