Over the years, a number of Tektronix manuals have featured small cartoons, such as:
184 Disabled Man
536 Filter Check
564 Washer Woman (cleaning up the excess from some over-enthusiastic flood guns)
454 wizard
1401A Log Amp
7A26 Sharp Shooter
Before operating, read the instruction manual
650 External Sync (sink)
2942 (Not) RIP
2942 External Sync (sink)