Jack received only a momentary glare from Fury and a muttered, "I'll put a bullet through your skull and you can find out yourself just how good my aim is, motherfucker" before he turned his attention to Kitty. "So far- and we're still testing the limits- the thing can keep running for about five hours at a time. Thing is, though, that time passes differently in these other places. We had a guy gone half an hour once and said he was in some jungle for a week. Watches from here seem to continue working in alternate realities, so you'll be able to monitor how long you've been gone."