The light isn't great, but you can make out that the package is a portrait of the famous mad World War II Nazi, Adolf Hitler. Its brown wrapping paper seems to have done a good job of protecting it from the pool of blood rapidly collecting about a knife wound to the stranger's leg.
In the meantime, fearing that the would-be fare has died, the taxi driver has sped off.
You can:
Take the painting and
run like hell
back to your hotel.
Bend down and
check that the stranger is OK.
Place the against a nearby wall and
leave
it.
Deliver a swift
kick
to the stranger's groin. Nazi scum!