From Larry Hurtado:
[A]nother dreadful “thought for today” on Radio 4 this a.m., this one ostensibly taking as its pre-text (and I use the word advisedly) that today is Ascension Day, and opining that Jesus’ Ascension (portrayed solely in Luke-Acts in the NT) means that Jesus has deaked out and we’re on our own! So, children, the moral lesson is that we should just face up to it and learn to cope. Hmm. Well, just goes to show you what the exegetical equivalent of a drive-by-shooting can produce!
For Hurtado’s further recommendation and brief comments on Arie Zweip’s monograph on Jesus’ ascension, see here.