i pinched my finger

so today i went to a friends house to remove his cd player in his truck and when i was unhooking his batter cables to disconnect his power wire i pinched the shit outta my finger and i have a crazy gross blood blister on my finger, so i thought it would be cool to take a needle and pop it and nothing happened. im so pissed about it. it was almost not even worth pinching it in the first place. oh but i got more ram for my computer today so it runs like a champ now! friends rock.