Everyone's taste buds are different. Some are more sensitive to spice than others.
I just tried it myself and it went just as i expected, my mouth went dry with a layer of wat cinnamon powder sticking to the sides of my mouth, and a core in of dry powder in the middle of my mouth. i then proceeded to chew the core until it was wet enough to swallow. no coughing, no gasping for air, the only annoying thing about it is that i was pretty spicy, but not even that spicy. so tell me, are they acting in all the videos?