Don’t be beguiled by the pretty fruit; this small rainforest tree is seriously nasty.
It is the Stinging Tree (Dendrocnide moroides) and any contact with leaves or stems is painful – even through thick clothing as I can attest (the price for this photo).
People have been hospitalised in consequence (my case was nowhere near that bad) and the pain can persist for months.
Stinging Tree is in the same family as Stinging Nettle - Urticaceae.