There's behaviour badly acted and behaviour acting badly
Red-capped Plover (Charadrius ruficapillus) gets wires and fake injuries a bit crossed on Lucinda sandspit. Fluttered away ever so piteously, then at full stretch gave the game away. And still I came close to stepping on eggs.
In Tyto, juvenile Welcome Swallow (Hirundo neoxena) suffers unwelcome piggyback attack. Assault lasted 2-3 minutes before all bar victim flew off. Perhaps it somehow mixed with wrong siblings. Assault was quiet, though images noisy because of high ISO to capture flight.