Merry Go Round at Heathrow:

8.30 - outta Terminal 4 from my transatlantic flight
9.00 - check in at Terminal 1
10.00 - strolled to departure lounge to go to flight scheduled at 10.45
10.15 - board announced that flight was delayed to 11.45
10.30 - board suddenly read (or I misread) that gate is closing
10.31 - ran to gate (what felt like) 0.8 miles away from departure lounge.
10.34 - gate closed. Ground attendant asked me where I'm off to. I tell him Amsterdam. Wrong gate. I was fuct.
10.36 - Ground attendant told me that the flight was scheduled for 12.00.
10.45 - couldn't get back to departure lounge without going thru security. The line for connecting flights went on for miles and miles with enough ppl to fill Noah's ark.
11.00 - walked through customs as arrivals, entering UK territory for the 2nd time in the morning.
11.30 - cleared security the 2nd time.
11.45 - boards Amsterdam-bound flight.

All this time carrying 10kg tote + laptop somewhere between my shoulders, forearm and fingers.
My lower back is aching.