Yeah I lost patience and closed my short on Friday because of that, so missed out on the gap down. Thankfully it went all the way up again and gave me a second chance to short at the same level!
I wouldn't feel to bad about that, holding over the weekend in these conditions is extremely dangerous, certainly if you use leverage.
Even though it seems unlikely right now, positive news from Ukraine/Russia and the markets will gap up massively. Unlikely but not impossible.
Better be safe than sorry.