...the success or failure of the date would
be based on the biochemical REACTION...
The Big Bang Theory Season 1, Episode 3
I guess I was hoping for a
different REACTION, but okay.
The Big Bang Theory Season 5, Episode 19
is having allergic REACTION to peanuts.
The Big Bang Theory Season 1, Episode 16
because, of course, this is an
exothermic REACTION, which means
Breaking Bad Season 5, Episode 14
...or drinking coffee while driving
reduces one's REACTION time...
The Big Bang Theory Season 2, Episode 5