Funny you say this - time before last same thing happened to me. Pinning was going so well and easy I got sloppy and didn't have anything handy to mop up any blood coz I've never bled. Must've nicked a vein because when I pulled out blood squirted all over the place and onto my cream colored rug. I cupped the hole trying to catch anything coming out while hobbling over to the bathroom. To be honest it kind of freaked me out. Was all good though but did leave a bit of a bruise probably due to some internal bleeding. Was more careful next time and will be from now on ..