I'm sure many like me find the Comet landing (although it is far from perfect) incredible.
Planned over 10 years ago with just the computer power available to them then. Millions of miles away, a 1-2 mile object travelling at thousands of miles an hour. A signal delay of about an hour I believe... Exceeds my mental capacity (not that that's difficult).
Even the first bounce - 2 hours! That takes slow motion to new levels surely...
RH.