Complex sentence: After Jack speaks in front of Rory by correcting his last sentence, Rory sympathizes with Charlie not having a father (he himself also lost his father, as mentioned earlier in the film) and helps him sneak Jack onto a truck en route to the mountains.
Split into simpler sentences: After Jack speaks in front of Rory by correcting his last sentence, Rory sympathizes with Charlie not having a father (as he himself also lost his father, as mentioned earlier in the film). Rory then helps him sneak Jack onto a truck en route to the mountains.