Barry claims the Naga Jolokia pepper is "The world's hottest pepper." At the time of episode production and release, the world's hottest pepper was the Carolina Reaper, approximately 35% hotter than the Naga Jolokia.
When Barry and Linda communicate on their cell phones, they appear at first to be active phone calls (as you can clearly see on Barry's phone the hang up button), but then when it pans to both of their cell phones, you can see that neither are in phone conversation mode. Barry's phone even has an answer and hang up button.
While Joe and Cisco are on the phone, "Answer" and "Ignore" can be seen on Joe's screen as if he had never picked up the phone in the first place.