One can suspend MacBooks with a magnet too
One thing which I always found fascinating since I first began to use MacBooks (for an iOS development job, that is), is that I quickly found out that you can trigger the lid sensor in a MacBook by putting a phone or magnet on the palmrest.
The Hal sensor Apple uses for that purpose is apparently sensitive enough that even the relatively weak fluctuating EM field of a phone (iPhone or Android phone) was enough to put the MacBook into standby. Put phone on left side of the palmrest, watch MacOS check out. Also a delightful prank to pull off at the office, especially during a meeting :)
It appears that pacemakers use similar Hal sensor technology, which would result in a similar standby mode when exposed to the stronger MagSafe field. Real shame that humans aren't as good as MacBooks at returning from standby mode, though.