This video shows that even helicopters have blind spots too and sometimes funny things happen when you least expect it. Check out this firefighting pilot who accidentally hits a truck with his bucket spreading his load all over.
In 1997 at an airshow in Bratislava one member of the Russian Knights aerobatic team forgot to lower the landing gear of his Sukhoi Su-27 Flanker. As a result of this incident, only helicopters were allowed to perform that day. As for the aircraft, there was some damage to the underside but nothing major. The plane took off heading for Russia only two days later. Very solid plane… and beautiful too…
