I spent 4 hours at the gym.....

I have never ever ever done that... Ever..... My friend told me he would meet me there at 9 to lift so I decided to go earlier and get my cardio in. I got there at 8:20 and got on the elliptical. He got there at 9 and we "got SWOL".  We worked some legs but mostly upper body. Last night driving home my arms were so exhausted I could barely drive. I woke up this morning and  was surprised my arms didn't hurt at all.  That was 2 hours ago.... My arms are becoming more and more fatigued.  I am keeping my protein intake solid and I have been stretching.  Here's to going hard and shocking myself.