These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Terminal Velocity
Demonic Spiders: The Hydro-sleds from Centauri III with their nearly unavoidable lasers able to kill you in 15-20 shots, which is not a lot, but considering there is always more than one sled it quickly becomes a Bullet Hell. It doesn't help that you start the level without any of your previous weapons to strafe around them and kill them quickly. After the first mission however, they either shoot at the ground or in your opposite direction which make the rest of the level a breeze.