  We revisit a ballistic deposition process introduced by Atar, Athreya and
Kang. Let $\mathcal{G}=(V,E)$ be a finite connected graph. We choose
independently and uniformly vertices in $\mathcal{G}$. If a vertex $x$ is
chosen and the previous height configuration is given by $h=(h_y)_{y \in V} \in
\mathbb{N}_0^V$, the height $h_x$ is replaced by \[ \tilde{h}_x := 1 + \max_{y
\sim x} h_y. \] We study asymptotic properties of this growth model. We
determine the asymptotic growth parameter $\gamma(\mathcal{G} )$ for some
graphs and prove a central limit theorem for the fluctuations around $\gamma (
\mathcal{G})$. We also give a new graph-theoretic interpretation of an
inequality obtained by Atar et al..
