black hole
SINGULARITY INJECTION ZONE DANGER NOT ONLY WILL THIS KILL YOU, AND NOT ONLY WILL THIS KILL YOU PAINFULLY, BUT THE SUBJECTIVE TIMESPAN OF YOUR AGONY WILL BE EXTENDED TO INFINITY (IF YOU DO NOT UNDERSTAND WHY, START RUNNING NOW) – seen in Unit 3, Dark Star Power Plant, Xavéral
trope-a-day
Year Outside, Hour Inside: Thanks to relativity, truth in television for lighthugger crews, who slowly build up a hefty time differential (and cultural delta) with the parts of the universe operating on the empire-time frame. (Hint: if there’s a family member or social grouping you just can’t live
gaming
You can’t play MMOs on a lighthugger in flight even with access to copious amounts of tangle (or, for that matter, any other theoretical kind of ansible), because relativistic time dilation causes terrible, terrible lag.