Flat places where you can see far into the horizon seem like places where one is most likely to see these. Perhaps because in such places you can see so far. Having said that, I've experienced microbursts (or been very close to one) on mountains, islands and a variety of landscapes. It can be amazing to be in the midst of one. It can be equally awe-inspiring to watch from a distance, or be right next to one and just miss getting hailed on or getting that absolute drenched-in-a-moment experience, perhaps getting just some wind and a bit of light rain while a few hundred yards away, somebody else is getting hammered
If one is climbing in tall mountains it's always wise to be back down by afternoon, as, especially summer afternoons can gather up big storms in very little time and lightning strikes are a real possibility. I've had ringing ears, flying hair (others described it as looking like I'd stuck my finger on a Vandergraff generator... with my long hair in a flying halo around my head) and hot spots where metal touched my skin when we didn't heed that warning and were caught high on a summer afternoon. We instantly high-tailed it down a steep slope to decrease our risk and it worked. Lightning struck above us even though there was only a little, slightly grey cloud in the sky with no rain, but clearly a large potential energy.
I've always loved storms!
The trick is to stay safe
