a-40k-author:

Scifi fan: So, how do your spaceships get places?

Star Trek fan: Matter and antimatter are mutually annihilated in a fusion reaction that warps space-time sufficiently to drive the ship faster than light.

Star Wars fan: Hyperdrives use hypermatter particles to hurl a ship into hyperspace, allowing it to take advantage of wrinkles in the fabric of realspace to reduce journey times significantly.

Warhammer 40,000 fan: They go through hell.