I just had my first relatively bad wreck yesterday… my foot somehow came unclipped when I was trying to get my water bottle. I the bike went careening off in one direction and I overcorrected…I ended up landing right shoulder, hip, and elbow...my helmet is crack and my shirt shredded (my NEW shirt…) I got up and I was so happy nothing was broken and then…I blacked out. I’m just wondering why that happened and if it’s normal? Does it have something to do with the endorphins or adrenaline or something?