We at MOA would like to warn well-meaning cat companions that catnip may get their cat(s) high. Behaviors that, in the ~50% of cats susceptible to the evils of nepetalactone, may be brought on by this dangerous drug include but are not limited to:
Dangerous, even irrational jumping, biting, or scratching.
Chasing of non-existent prey.
Laughter (on your part).
Please protect your cats (kittens under six months of age should not be affected, but neither should they be exposed) from the dangers of this psychoactive substance, and avoid the 'nip.