When the dying Predator activates his self-destruction, the resulting explosion is just one small mushroom cloud, suggesting the ship is still out there.
If the Predators blow themselves up to avoid revealing their presence on Earth, flattening a two-kilometer circle is a terrible way to avoid detection.
The M134 minigun has a firing rate of 2,000 to 4,000 rounds per minute. Such a beast would require so much ammo that even big-bad Blaine couldn't lug it.
It's one thing to use a shoulder cannon to take out Ol' Painless-wielding Blain. It's quite something else to use a homing weapon like the Smart Disk introduced in "Predator 2."
The climax of "Predator 2" shows Lieutenant Mike Harrigan (Danny Glover) tracking the mortally wounded City Predator (Kevin Peter Hall) into the Los Angeles sewers.
When Harrigan discovers the parked spaceship that brought it to Earth, it leaves viewers to wonder how a spacecraft gets into a sewer, let alone fit in one.