Praise GOD!!!
Because of your faithfulness and the anointing upon you is why you were able to "be in the zone". I'm sure while you were playing you ended up playing some stuff that YOU HAD NO PREVIOUS knowledge of and was like THAT SOUNDS GOOD.
When we are available vessels GOD through HIS anointing can MAGNIFY or INCREASE our gift or talent.
To quote ol' mother Sherman.... "keep on keepin on!!!"