"I don't know (what went through my mind), really," Henderson told liverpoolfc.tv. "It all happened quite quick.
"I think someone slipped and I went one-on-one with the goalkeeper and just tried to slot it past him.
"Fortunately it went in, so hopefully I can do that on a more regular basis next season.
"It's always nice to score. Everyone wants to score goals, but it's not as easy as that and you've got to keep working at it - and hopefully I can do that."