Not to worry
If you are using the GM automotive style MAP sensor, Black rectangular, with the 3 wire connector, it is built to withstand engine backfire and turbocharger induced positive manifold pressures without using a restrictor in the feed line. This is a very durable and reliable sensor that will not be damaged with a blow in the tube. Likewise, small amounts of moisture doesn't seem to bother them, as they are exposed to plenty in the engine bay. Mounting them higher than the engine fitting is advised, as we had trouble years ago with accumulated moisture freezing in the line, hence, no MP until the thaw. GM tech for 38 years, and have seen many replaced, but only a handful of really failed sensors.
Light shedding I hope....
Chris