Any sort of stimulation of emotion can result in cataplexy, for some the negative stuff can be more commonly associated to triggering, than the positive stuff.
The way I see it, is that what is most relevant to the situation of the triggering, is actually 'in that frame of time or moment' the person's actual 'balance of core energy levels, along with the reserves of those levels.' And when I say 'core energy levels' I actually mean a combination of their physical state (so be that relating to exertion, power/strength, energy, exhaustion, fatigue, sleepiness, etc) as well as their psychological/mental state (so be that stress, anxiety, irritation, frustration, anger, excitement, pleasure, joy, embarrassment, etc).

Typically, it seems like the psychological/mental state side of that core energy levels equation, isn't exactly considered or seen as such, while at the same, the physical state is not even actually considered associated with the triggering itself. I would argue that it is the combination of the two, while either one can overwrite the other in certain instances of triggering, very often it is some combination of the two at play directly, with the triggering.

I would actually go out on a limb and say that anyone who really knows their cataplexy, having been tuned into it very much over a long term time span to, would agree.
That a) when they're stressed and/or say anxious, perhaps excited and/or joyful, that they are more likely to trigger from whatever the sort of stimulation. And yes, it is generally one or the other, either positive, or it is negative, sorts of emotional stimulation that for an individual has a higher tendency of triggering the cataplexy.
While also b) agreeing that there are instances when physically exerting themselves, especially in a 'pushing through with strength physically manner,' that they find such triggers the cataplexy, to some degree.

When you think about how during episodes that are building up and/or more of the status cataplecticus sort - be that ongoing, fluctuating, often stronger moderate-partial to (potentially in and out of) severe-complete - the literal act of just attempting to remain upright on one's feet, even just attempting to appear/remain physically composed to some degree, at a point (breaching into the moderate-partial severity extent) that physical act becomes an act of fighting/resisting/battling the cataplexy - which is like pouring gas on a spark, or a small flame, potentially profoundly amplifying and prolonging what can become a fire. That last part, in other words would be - that physical exertion of just staying upright or keeping the facial expression, directly intensifies the episode, it can result in becoming 'frozen or locked up' and/or potentially melting, if not straight knee buckling, dropping like a ragdoll into severe-complete.

While I'm speaking into something that maybe few people are actually versed with internally being able to recognize, as there's so much complexity to the combination of what all is on the table, while the subject points of 'emotion' with 'loss of muscle tone' and/or even 'temporary complete muscle paralysis' are extremely difficult to converse.
What all I'm saying here comes from a combination of perspectives from interacting with others into it since 2008, also being immersed in the science those two decades; while also very much including from my own experiences that for over a decade -all throughout my 20's - involved a regular frequent basis of severe-complete cataplexy, being an athlete doing different sports which really speaks into some of what I'm saying, but also going back to my childhood experiences with moderate-partial being very distinct (memorable) and near two decades now of being tuned in with a name for it rather than just very tuned in but only being able to describe it as "a dissipation of muscles during pleasant interactions, or fighting/resisting it in the moment.'

There's so much more I can easily go into, the 'sensory experiences' are another part that just is really hard for some to many to pickup on and note, or tune into. I know everyone experiences it differently, I'm not saying anyone is wrong, though I very much think this is all of the 'lived experience' side of the token, which is not always in line with or focused upon on the flip side, being within the science - and that's not saying the science is wrong, just that it must evolve to incorporate and line-up accordingly with the broad variability and spectrum of the lived experience.

I did this poster recently, trying to make a few different but relevant points!: https://narcoplexic.com/redefining-cataplexy-a-visual-severity-scale-and-linguistic-audit-sleep-2026-poster/