When Matt is attacked by the scissors lady outside the house he is fighting her and the camera changes and the lady is not there and Matt is just pointing at the other women. Then the camera changes back and Matt is still fighting the scissors lady.
When Matt gives Vince his "backup" water-gun, its tank is full. Vince holds it up to see that it is almost empty. In the next shot it is full again.
The type of land rover mickey tries to break into has sliding windows that would break quite easy and it definitely wouldn't have an alarm system on it.