Spotted...

This could be an interesting offshoot of our understanding of brain area as it relates to its activity.

For example if you wanted to be more forceful you could wear a helmet that did not protect the area of your brain related to timidity (maybe some Phrenology creeping in here), then go for a brisk cycle in traffic brakless, no foot retention, earphones in, not looking behind you.

interesting.
volunteers?
we'd need a control group as well.