I’d have to grab my book for specifics, but a very large (80%? 90%? Something like that) proportion of the entire lot has to be covered in flies for the “flies shaped like an arrow” to attack.
The more expensive an electronic item is, the more likely it is to electrocute a hapless sim. The likelihood of electrocution is also inversely proportionate to a Sim’s mechanical skill. So if you have a zero-mechanical skill Sim, have him fix the computer, and he’ll very likely get zapped.
Can you still drown themn in Sims 2? Install a pool have them jump in and take out the ladders?
Flies shaped like an arrow, you say? Maybe they’ll attack more often if your sims were skateboarding at the time 
Yep, that works, but it has a couple of drawbacks.
You can’t save them. If a close relative or friend (the chance of success is connected to their relationship score) pleads with death on your behalf, he may bring you back to life. With a drowner, death appears standing on the surface of the pool, so nobody can reach him and ask for ressurection.
Wet ghosts. Each ghost is different depending on how it died. Drowning victims are bluish and drip water wherever they go. Ghosts in Sims2 wander around a lot longer than they did in Sims1, which means that in the morning your house will be covered with water, and your yard will be filled with weeds, dropping everyone’s environment score to rock bottom. Even hiring a maid and a gardener may not be enough to keep it in check.
Electrocution survivors are neat, though. They look like post-explosion Wile E. Coyotes.
You know it’s only a matter of time till those damn things climb out of the computer and start chasing you around with little knives, like Zuni fetish dolls.
The best thing about this is that it changes your aspirations to “stay home from work.” This, I feel, is an appropriate response.
–p
To die by flies, you should “lock” a sim in a small room with a pizza box. Have them clean up and drop the box over and over until the room is covered with garbage. Then make them walk back and forth through the garbage. Eventually, the flies will attack.
On the topic of Sims, I saw the funniest thing one time. This person had made their Sims the smallest house possible. They put no doors in and only put in a fireplace and a clown picture. Then they documented what happened.
I wish I could find it again. If anyone knows what I am on about please let me know where it is. I almost wet myself laughing last time.
Found it
Enjoy if you are a mean bugger like me.
That was great!
Good god! There must be a diagnosis for whoever posted that (and for me, for laughing so hard).
That just had me in tears!