Harrison Bergeron

We never really find out in any of the viewing public were affected by Harrison's rebellion. Although his father and mother noticed something different, they were prevented from pursuing the idea in any detail. Harrison might have died but perhaps somewhere the idea of Harrison lingered in the brain. Vonnegut holds out hope that somebody will remember the idea of Harrison and ideas are bulletproof.

Why was harrison able to break the basic laws of gravity after freeing himself from handicaps?