Benzos can cause paradoxical reactions and induce mania in rare cases. Haven't experienced it myself but I've experienced both rebound anxiety and symptoms of mania in between doses of Klonopin. Though this occurred at the beginning of treatment before blood levels had stabilized.
'As human beings, our only sensible scale of values is one based on lessening the agony of existence. That plan is most deserving of praise which most ably fosters the creation of the objects and conditions best adapted to diminish the pain of living for those most sensitive to its depressing ravages.'- H.P. Lovecraft