Jesus hanged from a tree? OMGWTF?

Don't know what I'm talking about? Check this out.

Acts 5:30 (NIV)

'The God of our fathers raised Jesus from the dead - whom you had killed by hanging him on a tree.'

I mean, huh?

I re-read that passage a few times, then freaked out and smsed Elim about the verse. That was about 4.30 in the morning.

I thought it was perhaps a figurative usage, as in 'You should just go and hang yourself' or something. Elim's reply was

'The cross is made of wood, which comes from the tree!'

Lol.