We cannot judge from your extract what is being 'witnessed', and 'witness' has several meanings, one of which is vaguely synonymous with 'spectator'. The former usually sees a crime or legal event, while the latter usually sees a sport or other visual entertainment. Being unable to do something does not make someone dumb, however: can you pilot a helicopter?
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.