Stewie Goes for a Drive - S10-E4
Corrected entry: As it starts to rain, Stewie gets stabbed by a random stranger. Later on the bus, and when he gets off, there's no evidence of the stabbing.
Corrected entry: During the chicken fight, one of the clones blows one of the cloning machines up. However, seconds later, they are both intact. (00:04:45)
Correction: It was only the interior of the machine that got blown up after one of the Peter clones threw one of the chicken clones into the machine, whilst the exterior of the machine remained fine. In fact, it can be noticed that the broken glass is shown from when one of the Peter clones threw one of the chicken clones into the machine just as the explosion that destroys the facility occurs.
Correction: This was done as a joke and a call back to an earlier joke where Stewie says "at least it's not raining" and then gets stabbed. The effects aren't permanent, just like all the times Peter's been mortally wounded only to appear normal in the next scene.
Bishop73