Bizarre SideEffects with HorsePower

So this morning I start a new cycle with this stuff (after about a month break).  I take it... and while waiting for the gym to open I get really itchy... and it almost feels like something is crawling under my skin. 
 
Did anyone else have this effect when taken?  I never had it the first time I tried it... so kinda worried.

I take N.O. Xplode (same type of supplement I think) and I occaisonally have this feeling in my forearms. I goes away if I just concentrate on lifting and never lasts more than like 20 minutes. My only guess is that it has something to do with the higher than normal amounts of blood in your larger than normal viens or something along those lines. Probably the reason it effects the forearms so much is because they have a very high concentration of veins.
 
When it happens to me its never serious, but for you it may be different. I suggest you see what others have to say and research it online.

Age: 19
Weight: 165
Squat: 300 x 1
Bench: 245 x 1
Deadlift: 315 x 4
Powerclean: 185 x 1; 135 x 12

Watching my calves grow is like watching a pot of water come to a boil... 

http://bodyspace.bodybuilding.com/megaman77/

i believe its the beta-alanine thats causing that effect.  beta-alanine can cause a tingling sensation the first few times you use it.  after that though youll get used to it and the feeling will go away.

IM BACK AND BETTER THAN EVER!!!!!

so after a few days back on, the weird ****ly feelings have dissipated greatly...
*phew*
thanks for your responses guys!