.. i agree with broken bones dont take a bus(ambulance) and whatnot.. but as far as not going to the ER for scans.. exspecially after a head injury is just not smart.... you may feel fine.. or only have a headache but swelling on the brain could be present as well as internal bleeding and a slew of many other things... and unfortunatly i have seen on more than 1 occasion some one die from not getting a head injury checked out or attempting to wait to get into their PCP( primary doc) and i dont know about many other but i would rather spend the bucks and know my head is good then not wake up from that nap.. that you had to take cuz your tired(symptoms of a concussion) and yes if you have to ask that is the firefighter/emt/medtech in me speaking so yup just as you said at the bottom of your post get a ride and go the the hospital but do go.... always be safe then sorry... tho most trackdays that ive seen they require you to take the bus when the medics on scene deem its ness.. and it would always be wise of you to listen to the people that do this for a living