If there were one person, or rather, two people we would not want to mess with on Pretty Little Liars, it would have to be the duo-in-black, Toby (Keegan Allen) and Mona (Janel Parrish). And after last night’s episode, you should know why. Five words: Toby will run you over. Just ask Lucas (Brendan Robinson).

So here’s the deal: Toby spent the first few minutes of the episode trying to run down a skateboarder (in a black hoodie) with a large SUV. He failed. But Lucas spent the rest of the episode limping around town and told Hanna (Ashley Benson) that he suffered a skateboarding accident. So assuming that it was indeed Lucas that Toby tried to run over, what was the motivation?

Perhaps Lucas was one of the people who tried (and failed) to push Aria (Lucy Hale) off the “A” train, and Toby isn’t happy with his efforts. Or, based on Lucas’ decision to warn Hanna later in the episode, maybe Toby sensed that Lucas regretted ever getting involved with all this mess (how involved, we don't know) and was scared that he would start talking?

Or does Lucas know something that we don’t? Is that why Mona whispered something to him in the hallway?

Then again, there’s always the possibility that Lucas was lying about his skateboarding accident. But if it wasn’t Lucas that Toby tried to run down, who was it? Could it have been the wounded Jason (Drew Van Acker)? What about Caleb (Tyler Blackburn)? We bet he owns a skateboard or two.

Catch the return of PLL Season 3 on Tuesday, January 8, 2013 at 8 p.m. ET/PT on ABC Family.

Samantha Highfill is a contributing writer to Wetpaint Entertainment. Follow her on Twitter at @samhighfill.