When Toman broke Dia's gun, it was clearly revealed to be a hollow prop.
The machine the robot gardener was using isn't doing anything.
When Buck is fighting with Toman, his stunt double is clearly seen performing his usual high kicks and karate moves.
Buck and Dia come across a stretch of lawn on Zale's property that is covered by a "photon shield" which prevents them from walking across it. Dia deactivates part of the shield and makes a corridor through it using a device she has, but there seems to be no reason why she and Buck couldn't just walk around it instead.