I happen to think that his best work are The Pink Panther movies. I used to watch those with my dad and they always cracked us up. They had a wonderfully zany energy, both deadpan and slapsticky and contagious. Peter Sellers was genius.
I'm not a huge fan of his other work, but The Pink Panther movies gave me many hours of joy and laughter.
I love this bit. It reminds me of the TSA.