That's the moment you caught (I'm on another computer)
docker-machine create --driver virtualbox uhu
Creating CA: /home/thatanero/.docker/machine/certs/ca.pem
Creating client certificate: /home/thatanero/.docker/machine/certs/cert.pem
Running pre-create checks...
(uhu) Image cache directory does not exist, creating it at /home/thatanero/.docker/machine/cache...
(uhu) No default Boot2Docker ISO found locally, downloading the latest release...
(uhu) Latest release for github.com/boot2docker/boot2docker is v18.02.0-ce
(uhu) Downloading /home/thatanero/.docker/machine/cache/boot2docker.iso from https://github.com/boot2docker/boot2docker/releases/download/v18.02.0-ce/boot2docker.iso...
(uhu) 0%....10%....20%....30%....40%....50%....60%....70%....80%....90%....100%
Creating machine...
(uhu) Copying /home/thatanero/.docker/machine/cache/boot2docker.iso to /home/thatanero/.docker/machine/machines/uhu/boot2docker.iso...
(uhu) Creating VirtualBox VM...
(uhu) Creating SSH key...
(uhu) Starting the VM...
(uhu) Check network to re-create if needed...