He Was One Mile Off West Field Boundary At 600ft. He Did Land Immediately  

Nope.  I was reply number 1 and 3.  I'm just a guy who has a respectable amount of EC135 time and know there's a few fire scenarios that wouldn't give you any fire indications or a land immediately even if you were quick and had the emergency checklist memorized.  It sounds like there's a few others that feel the way I do.

Engine fires in flight have you messing around with the checklist for a minute before giving you a land immediately.

Electrical fires can have smoke in the cockpit with zero fire indications and the checklists have you juggling the bus ties and generators off and on trying to isolate the problem before giving you a land as soon as possible. 

Armchair quarterbacks are screaming they'd blow the checklists and land half a mile away from their land immediately decision point on a busy highway (because that's the distance it would take to get slowed down and lose altitude) vs half a mile away landing at an airport.