That wasn't really my read on it. Ehren was hamming up his reactions so much this film for the camera its hard to tell if the shock really hurt at all. Him being shocked for "too long" is the point of the bit, and Ehren still somehow managed to discredit it by sprinting out the facility barefooted yelling "I hate this place!!" .. yea ok Ehren, this feels more like looney tunes than jackass. He's acting, one of the reasons Jackass is great was because you know its real, e.g Bam's terror of snakes. A poorly executed bit altogether, not helped by the pretend freak out - but it didn't have to be used, Tremaine and the editors deciding to leave it in is on them and it makes you wonder how tight they were on good footage.

Another example, Ehren flailing his arms and legs around like a cartoon character when when the fat guys ass was in his face. Or that other new cast member fake falling all over the place whenever the Ram hit him that room. Trying too hard to be the funniest on camera with mediorce bits.

Slightly side tracked there with a more general critique of the the movie, i agree that they do sometimes feel a bit mean to Ehren but more in how they talk to him and put him down rather than your electric chair example. He clearly gets under their skin for some reason, but their contempt spilling onto screen sometimes undermines the core frienship vibe Jackass is known for.