I just helped a friend move a snowmobile (there were a few of us). We just pushed it down an alley and into his yard. I didn't even push my very hardest the whole time, but right after I started getting dizzy and light headed, I was breathing as hard as I could (so hard my throat is sore right now), my ears even started ringing a bit. What's up with that? Is it cause maybe I've been basically sitting down driving or sleeping the last 40 hours and suddenly did this out of the blue?