Many common insecticides work through a neurotoxic effect, particularly general insecticides that kill a wide range of insects and arachnids. You want to be very, very cautious using neurotoxic insecticides because most of them can cause neurological damage in mammals as well.
The safest insecticides tend to be slow-acting and target only particular species, but most of these are rare outside of agricultural use. The average homeowner does not want to whip out a magnifying glass and a field guide to identify the species, sort through a broad collection of specialised insecticides to select the one that targets it, and then wait a few days for the bug to die. They just want a basic spray that will kill everything, and fast.
Unfortunately, such sprays come with a risk of neurological injury to yourself, your children, and your pets if you don't follow the safety instructions to the letter. You don't want anyone eating any of it, breathing it, or getting it on their skin/fur.
Obviously a neurotoxin, but I don't know the specific product. He is a relative of friends of a friend; and happened some decades ago.
People don't need to know if an insect is harmful or inoffensive, but just "it has more than four legs, kill it with fire!" is a moronic way to deal with this planet of arthropods. And it can destroy your life.
The safest insecticides tend to be slow-acting and target only particular species, but most of these are rare outside of agricultural use. The average homeowner does not want to whip out a magnifying glass and a field guide to identify the species, sort through a broad collection of specialised insecticides to select the one that targets it, and then wait a few days for the bug to die. They just want a basic spray that will kill everything, and fast.
Unfortunately, such sprays come with a risk of neurological injury to yourself, your children, and your pets if you don't follow the safety instructions to the letter. You don't want anyone eating any of it, breathing it, or getting it on their skin/fur.
I recommend just getting a flyswatter instead.