Whiffs found surfing

[Rick Lowe]

Sturmtiger and use the funky mortar as
as a combo lift/propulsion device.

I've read a sci-fi story where the main character found his Plasma Cannon* (a hand-held weapon in this instance  ) could be used as a propulsion device in low/no-grav environments... of course, this left a trail of destruction behind him, but hey - there're disadvantages to anything...

*the Strohl Munitions BH-209, if you're interested.

There's a Larry Niven story ("The Deadlier Weapon" IIRC) where exactly the opposite happens. A crew of totally peaceful future humans, who firmly believe all advanced species must be equally peaceful, encounter violent & predatory aliens for the first time in hundreds of years. One of them studied history and was sufficiently mentally stable to be allowed to view the restricted-access History of Warfare. He turns the ship around as if to flee, engages the drive on full-power, and cuts the alien ship in half. Afterwards, far from cheering his victory, he's profoundly depressed, because he knows all the dreadful arts that humanity is going to have to relearn very shortly.

Interesting premise.