[1-4]: The subordinate clause introduced by þás ‘when’ (l. 1) has a suppressed subject in the sg., but the situation implies that this is Þórr (Finnur Jónsson 1900b, 398). Kock (NN §2253) avoids this by taking þrasir veggjar ‘the furious one of the wedge [= Þórr]’ as a subject. However, that interpretation forces the emendation of þrasis gen. (so all mss except R) to þrasir nom. and an unattested meaning ‘wedge’ of ON veggr ‘wall’.