Heat has really complicated triggers that it took me a bunch of effort to work out back in 2011 when I improved the run of that level on SDA. I got a 5:28 run in 2011, compared to the 6:11 currently listed as WR here - and I see that some of the mistakes made in the 6:11 are ¤also¤ made in the top full-game runs here. So I thought I'd share what you don't know.

This comment of mine on Surviv0r's 6:11 run covers all the mistakes I could find:

It's worth not only anyone who wants to take on this level but also people doing full-game runs having a read and improving their route; even on the scale of full-game runs, 40 seconds is a big chunk of time!

My original run can be viewed at:

(and my 2011 commentary read at http://speeddemosarchive.com/CallOfDuty4.html under the section "Mark Amery's comments") for the who are interested.