A person is kayaking on a river and is steering himself in between two large rocks.
A human kayaks in a river.
A person drives a steamboat.
A man wearing singing into a microphone and playing a bass while standing nude.
A girl looking at the sky.
The person has an audience.
Bradley fled the room with his hair on fire screaming "I win! I win!"
There was a change in the situation after funds were clipped.
I doubt this approach has been followed well enough to be called a general rule.