When the O'Connell residence is under attack, Rick and Jonathan jump out the bathroom window to escape. If you watch carefully you'll notice that right before they hit the glass, it cracks. The entire window cracks. Even if it's fake glass (they use glass made out of sugar for breaking in movies and on TV, so the actor doesn't get hurt) it makes sense to have it crack so it won't hurt as much to jump through, but they could have made it less noticeable.