Check him.

"I'm, I'm OK," he drawls. "Just take the portrait, they mustn't get it back".

Leaning heavily on you as you help him to his feet, the severity of the knife gash to his leg is all too apparent. "Go - go! I'll delay them as long as I can.".

You can:

Take the painting and run like hell back to your hotel.

Say, " Quick! In here!", and help him into the pub.

Say, "But you need a doctor", and wring your hands earnestly.

Push the man down, toss the painting to one side and beat a hasty retreat.

The fact that you can hear footsteps running towards you means you're going to have to decide quickly.