Any tricks involving the paved areas or bouncing off of the buildings are a definate no-no. With the number of people present, it is just too chaotic with the potential for a wandering bandstander to come in or someone untrained "monkey see, monkey doing."
...and beyond that. One of the Medic's non-trained helpers (i.e pack-mule) is training in Free Running and Parkour, so I know he would needle you relentlessly if you came in to be treated.
