Hello Ginof, Welcome to the discussion and I hope you enjoy. I also hope you are male as there are mostly female participants on this one, and that is very unusual for these forums.
In some ways, it's too much: would anyone really be so calm under the circumstances? but on the other hand, how else could a person react without loosing their mind.
I don't think Arthur gets the chance to panic, as the catastrophe happens so suddenly. Of course, the book, says in calm letters on the front 'DON'T PANIC' - and that is bound to make a great difference, not.
He might have felt safe because, how could anything bad happen to him in his pyjamas (when my sons were young they both wanted 'Arthur Dent' pyjamas for Christmas) and with his towel? It reminded me of that episode in 'Smash' when they were unpacking the newly delivered supplies, and the conversation went:
'No, Shuttlecocks. They haven't sent shuttlecocks!'
'No, How can we be expected to fight a war without shuttlecocks!'
In fact, the humour in HHG reminds me of the humour in Mash in many ways. I don't think there is a camp character in HHG though.
Only those become weary of angling who bring nothing to it but the idea of catching fish.
He was born with the gift of laughter and a sense that the world is mad....
Rafael Sabatini