Hey , Joe ! Where have you been these past few days ?   I ’ Ve been busy with a first aid course that I started about a week ago at the Red Cross .   Cool ! I ’ Ve always wanted to do something like that ! Have you learned anything useful ?   For sure ! I mean we ’ Ve learned how to apply pressure to stop bleeding , how to check for a pulse , and even how to apply CPR !   Have you treated any real emergencies ? 