When she holds up the phone in the cabin, we see Helen's last name is Phillips, and her phone number is an actual one (not the usual 555 prefix), 424-284-9328. Area code 424 is from the Los Angeles area.
Helen's stunt double smashed the car windshield in one take.
Lyndsy Fonseca plays Jenny in Hot Tub - Der Whirlpool... ist 'ne verdammte Zeitmaschine (2010), another movie about time travel.
Linda Hamilton portrayed Sarah Connor in Terminator (1984) franchise, a series that also heavily involves time travel.