I am a volunteer ff and, as such, we all carry our handheld radios when we're out & about in case we get paged. Today I was leaving my small (~300 ppl) town and witnessed/responded to my worst call to date. There were a dozen or so bicyclists on the state two lane highway & one of them turned out directly into the path of a car. He was struck at ~65mph, thrown probably ten feet into the air, and landed on almost the opposite shoulder. I was the first person on scene & radio'd dispatch to page fire/rescue/ems as well as launch eagle-med (chopper). I checked his vitals...he had a pulse & was breathing on his own (barely). I reported multiple system trauma, code red, then proceeded to get people back 100 yds each way & have them stop traffic. EMS/Rescue got him stabilized, on the board, and on the bird, but I don't know what happened since then. I have no idea how many lacerations & broken bones that guy had but I know I never want to see a human body twisted into a shape like that again. I'll be surprised if he isn't paralyzed & I keep thinking of what more I could have done in that situation. It's like its on constant playback in my head...the whole event from the time I saw him get hit till EMS/Rescue arrived and took over. Worst call I've ever been on by far & the fact that I witnessed it & was first on scene made it that much worse.