A couple of months into my new Breaking Grounds career I decided it was time to establish some new fancy ground based science on Mun and Minmus.
Since I'd just added a Minmus Science Station in orbit and needed some science for it I started with the Minmus base.
Designed a lander with science instruments and a cargo container.
Worked as a charm, ground installation placed and activated and good science brought back to the station.
Time to repeat it on the mun.
Everything smooth until I'm about to leave the Mun, a quick glance on the dV readout tells me that there's no chance in Gehenna that this craft will get back into orbit.
Ok, redesign a Mun lander with more fuel and w/o the science cargo container and send it to rescue the stranded pioneers.
Thanks to MecJeb I get a perfect parallel parking 30m from the stranded craft, and using EVA Fuel Transfer (I always add it to every craft as soon as possible) I transfer most of the remaining fuel from the stranded lander, ship the crew and the science over, takes off and docks at the Munar Science Station in Orbit.
But I didn't transmit _all_ the fuel from the failed lander, I left some for a purpose.
Since I almost always add a spare control core even to manned crafts I could remote control the failure straight up to 10k and then had it crash back almost on top of the passive seismic experiment.
So the failed lander became a successful impactor