Massachusetts Avenue Station

Unlike with the Lemon Grove Trolley Station, it is much easier to sneak atop a Trolley here. All you have to do is climb the tree and jump onto the roof of the overhang (which is connected to the benches, which are then connected to the ticket machines)...
In order to get here, you must trek down a gruelingly long, sloping hill with idiotic Human drivers going up and down the hill's road this way and that. In fact, Berry Street Park itself can be found at the very top of this hill.
This station is generally quiet, only really hustling-and-bustling during the morning and noon hours. Cats often pass by here without much a problem—but so do dogs, raccoons, and coyotes, which would cause a problem.
The Trolley here always passes through a tunnel and under a lowbridge, so all I can tell you is to watch your ass and either flatten yourself against the Trolley or get the hell off of the Trolley in time, or else you'll get a snapped neck.