i wish i had reviewed the material director eaken mentioned. maybe i need to get better educated about the subject, too. for now, unless i know more, i'm still on the go slow boat. >> if i could add, the information that director eaken mentioned has some safety as well. i think i share your skepticism about the as actually being positive, necessary form of mobility. they are replacing walking trips. it was director rubke pointing out we doing a lot of measurement of collisions of these devices that are reported, we are raising san francisco general hospital and other data sources such as the police department and they are thinking the single digits, more or less area when we compare that to the number of auto collisions, as she pointed out, we should be doing this in a normalized way. it's probably an infinitesimal fraction of the collisions on the street. based on the observed behavior of these in the streets, and other items in this meeting, i think to the extent that this is really facilitating mode shift from tnc's two scooters, notwithstan