{As it were} (h(9373)). "As if," not a great mountain, but a
blazing mass as large as a mountain. {Burning with fire} (puri
kaiomenon). Present middle participle of kai(935c). Somewhat like
Enoch 18:13, but perhaps with the picture of a great volcanic
eruption like that of Vesuvius in A.D. 79. Strabo tells of an
eruption B.C. 196 which made a new island (Palaea Kaumene).
{Became blood} (egeneto haima). Like the Nile in the first
plague ( Ex 7:20ff. ). Cf. also  16:3 .