One of the workplace activities we rarely notice—bumping into people in the hall on our way to and from other places—turns out to be an unsung hero of innovation. As we find ourselves coming back to the office, many of us are rediscovering the delightful serendipity of this seemingly insignificant interaction. But don’t be fooled by its apparent lack of importance. Random collisions are anything but minor players in driving innovation across the enterprise. They are one of several antidotes to address remote-only workplaces (which, if left unattended devolve into siloed organizations). I was reminded of their importance in a…