Concussion

Fri, Jan 30, 7:49 pm: Where to meet/when?
Fri, Jan 30, 9:32 pm: Not sure about crossing the river heading toward Dave’s.
Fri, Jan 30, 9:42 pm: OK, should I go there now?
Fri, Jan 30, 9:59 pm: When you like.
Sat, Jan 31, 1:17 am: What time did you drop me off ?
Sat, Jan 31, 2:42 am: About 12:20

Where did 30 minutes go?