Wasn't first use of the day. But there were two of us in the little plane and neither of us were slender at the time. We were informed there were other small engines with the same problem after the fuel change. I don't know, just what I was told. Maybe something to do with lead? It was a bit a bid disconcerting, thinking the engine was going to quit completely and the only thing ahead was the river.
Oh, the club charged by Hobbs time, all fuel supplied.
But not as scary as a landing with a sudden down shear on final in a 172, slamming the plane down maybe 10 ft, hard enough to throw stuff in the back seat into the front - almost like hitting a wall. Or landing from the north with a strong wind from the west and entering the wind shadow from buildings on either side 1/2 way down the runway. Or the time a military fighter jet pilot thought it would be fun to buzz me within 1/2 a wing span, one second a tiny dot, the next, yikes.. Almost made my heart stop. Not as scary as a friend who took off and the inside suddenly tfilled with smoke (maintenance had spilled oil on the exhaust manifold.) Or the time some dingbat in traffic control had directed an airliner from the parallel runway to turn directly towards another friend on climbing out from TYS in a small plane - a shout on the horn ("excuse me but...") resulted in an abrupt change of direction by the other pilot, probably panicked the passengers.
I'm sure anyone who flys has lots of fun stories!
JKJ