@daniel @mary
I have never used MSG, but I have overspiced soup without meaning to. It was more of a disaster than what you are reporting (people running screaming toward bathrooms).
It was just one habanero, oh and a couple jalapenos, well and a chile japonese or two, and some white pepper...
@daniel @mary
Depending on the Serrano, they can be no BS for people who are not big fans of spice.
Also soup tends to spread around the capsicum. Same reason one has to be careful when peppering soup... too much and it blazes.