Looking at that video of R22 EOLs reminds me of something I have never quite understood. All the EOLs that I have ever done in the training environment in the UK over the last 15 years have been to a grass surface, whereas every US video that I have seen shows them terminating on a hard surface such as tarmac. Is there any reason for this? If you are going down for real and you have the luxury of a choice, should you pick grass or hard?