Annoying Brain Activity

Thoughts both damning and irrelevant splatter
Against the walls of skulls
Seeking exits so they might take flight.
Willful determination built of rubber matter
Bounces them around with a dull
Thud!
Imprisoning gnat-like creatures in viscous night.
Until one escapes victorious,
No longer gnat but hornet
Releasing its sting to an unsuspecting passerby.