Toilet,
Glug of water,
Answer a series of random detailed technical "how do I", "where is?" "can you help me with ?" questions from students and total strangers
Quick circuit or 2 with solo student who is bricking it on solo consolidation
Help someone else figure out how to start up or switch on radio
Tons of ridiculous paperwork and signatures in order to legalise the flight
quick banana to prevent collapsing
Oh goodness me is that the time now where is Bloggs? Oh Sh£$% he/she is in the aircraft waiting ! Classic is saying "start the engine and I will join you when I see it spinning," only to get into some fun hangar chat with a lovely potential female student and bloggs has already clocked up 20 minutes and hasn't actually left the chocks !