DragonofLife: You don't need to hold a truck up high to splatter people with it.
Try flinging it sideways really fast whilst it's quite close to the ground. You can get it to bounce along the heads of several humans and then land safely.
Thanks for the comments so far!
I realise that adding powerups and levels would be cool but this is my first Flash game and I made it just to get the hang of actionscript etc. I wasn't intending to go crazy and make it into some big project!
Ahahaa, I wonder if anyone can achieve the "God" rank.