R132. If you're ever tempted to use the even more subtler R140, just
drop the
gel on the
ground a couple of times and you'll get the same
effect.
I've written before re: the historical "trendiness" of adding
frost to every
ERS. When the
360Q ruled, R114 was de rigeur. The
Source Four begat R119. Currently consensus is split between R132 and R140 (see above).